NOT to put a downer on the whole thing, but I’m going to begin this week’s clubbing previews by talking about sarcoma, a particularly horrible form of cancer.

This rare and aggressive strain of the disease often goes mis- or un-diagnosed, leaving little opportunity for treatment for those affected.

There’s only one charity in the UK focusing on Sarcoma, so on Saturday a rag-tag bunch of Scottish indie icons – including members of Belle and Sebastian and Teenage Fanclub – are preparing to team up and put in a gruelling shift to raise funds and awareness.

The occasion?

A sponsored 12-hour danceathon, in which participating couples will aim to stay the course on the Flying Duck’s dance floor.

There’s an as-yet-undisclosed prize for the duo who can manage a full half-day of dancing (only one person from each couple needs to be on the floor at any time) - although surely everyone’s a winner given the sparkling lineup, which features Glaswegian melody makers in abundance.

The glittering All Star Band, comprising members of Belle and Sebastian, Teenage Fanclub and The Wellgreen, have been formed especially for the gig.

“We really enjoyed our first rehearsal [last] Wednesday,” Belle's keyboardist Chris “Beans” Geddes told The List.

“Whether it becomes its own thing, I don't know.

"But it was good fun and I think everyone's looking forward to the show.”

Also on stage are Disco Shark, a nine-piece disco classics outfit featuring Geddes’ bandmate Stevie Jackson, and ‘50s rock and rollers The Shiverin’ Sheiks.

And a 20-strong DJ contingent boasts BBC Scotland’s Uncle Vic Galloway and other local luminaries like Andrew Divine, Stephen Pastel and DJ Hushpuppy.

Local DJ and promoter Holly Calder planned the event after losing one of her best friends, Heather Morrison, to the disease two years ago.

“She was the queen of the dancefloor, always the first and last on it,” Calder told I’ll Be Your Mirror. “So instead of doing another sponsored run, I had the idea to do something that was a little more ‘Heather’… it’s going to be special.”

• Danceathon for Sarcoma UK, Saturday, The Flying Duck, 3pm – 3am, £15/£5

Jackmaster & Jasper James

IT’S easy to forget that Jackmaster is one of the world’s most in-demand DJs.

Just a few weeks after his raucous 30th birthday celebrations brought chaos to SWG3, the Radio 1 resident returns with a more low-key hometown show.

If you didn’t make it to that (more fool you), here’s a chance to atone: tonight, Jack will be going back to back with Jasper James all night long at the Subbie.

Expect the usual battery of eclectic bangers and prime house and techno cuts from these two old friends, who clearly love playing together.

On Sunday, the English DJ and producer Kieran Hebden, better known as Four Tet, takes to the club’s famous booth for a four-hour set.

More than 17 years and eight albums, Four Tet has made a name for himself as one of the most forward-thinking dance producers out there.

“No one else can make dance music sound so beautiful,” said The Guardian’s Betty Clark last year.

The recent “club mix” of Jamie xx’s Seesaw is a case in point: dropped on Twitter earlier this month, it’s a pacier, more direct reworking that maintains the original’s swooning, sparkling melody.

Listen out for that and his beautiful remix of CHVRCHES’ Leave a Trace at this intimate gig – if you can get your hands on a ticket, of course.

• Jackmaster & Jasper James, tonight, Sub Club, 11pm – 3am, £tbc

• Four Tet, Sunday, Sub Club, 11pm – 3am, sold out

Angerfist

When his career is over, Angerfist will not be remembered for his sunny worldview.

The Dutch DJ’s bewilderingly aggressive gabber is as confrontational as music gets: there are no choruses, no hooks, nothing there that could be described (however loosely) as a melody.

Yet people go nuts for it.

His sold-out show at SWG3 in September showed that Glasgow’s love affair with this violent, vicious house subgenre is as strong as ever.

Returning in support of his latest album Raise and Revolt (“the second summit of artistic violence, according to Dutch authority Art of Dance), this is a rare – although not entirely unmissable, I hasten to add – chance to see a truly fascinating artist at the peak of his powers.

No matter how it sounds, this should be an experience.

• Angerfist, Saturday, O2 Academy, 10pm – 3am, £24.00

Night Moves

Pop! South Weekender at The Glad Café

Q: What’s the worst date you’ve ever had?

1. Jen White, 29, Ireland, “It was back in Ireland when I was 15, and I had to get my friend Laura to call me and say there was an emergency. But there was no emergency.”

2. Sam White, 25, Ireland, “It was the first time I met my girlfriend’s Dad. I practiced my handshake all week. When it came to the big handshake, he just tugged my arm and I fell over in front of the whole family.”

3. Jo Healey, 25, London, “So this was right by the South Bank Centre in the middle of summer. We spent two hours crying and fighting among all the tourists and school trips. It was terrible.”

4. Rory Jenner, 31, South Side, “There’s actually been nothing that dreadful. Nothing at all.”

Joanne Carlin, 28, Glasgow, “Probably the one where I got dumped.”

5. Paul Carlin, 37, Shawlands, “The 13th Note, summertime 2002. I was on a date with a guy who kept calling me ‘lady’ and his favourite band was the Red Hot Chili Peppers. I spilled Tennent’s all over him – he had it coming.”

Frankie Reynolds, 33, Shawlands, “The time I turned up and had used hair remover on just about every inch of my body. It ended up alright.”

6. Brian McKinnon, 28, Glasgow, “It was a first date and I vomited right in the girl’s face.”

Caitlyn Page, 34, London, I did have a second date with a random guy who I didn’t like. It was cold in the cinema and I moved to get my jacket. He grabbed my hand and tried to hold it for the whole four-hour film.”

7. Doug Kennedy, 26, South Side

Favourite Club? Sub Club

Favourite Bar? The Glad Café

Favourite DJ? Unified Grooves

Favourite Band? Junto Club

What You Drinking? Guinness

First Club? The Arches

Describe Your Dancing? Non-existent.