The themed fixture has moved back from Ayr and Becky McCormick and Catriona Watson were dressed for the part as it was revealed how race-goers have helped the event support Scottish charities.
Those to benefit include Guide Dogs for the Blind's Glasgow centre, East End Kids and Co, Enable, the Glasgow Children's Holiday Scheme, Glasgow City Mission, Glasgow Simon Community, 3D Drumchapel, Sighthill Senior Citizens and the Wasp art studios in the East End.
Tamsin Ferrier, fundraising manager of Deaf Connections said: "Last year, race-goers raised £800 for us. This kind of money can pay for four interpreters annual compulsory training."
Vivien Kyles, chief executive of Hamilton Park Racecourse, said: "This meeting and, of course, Ladies' Night on Saturday, August 4, have always been seen as glam affairs.
"For many visitors part of the racecourse experience is to dress to the hilt for a great night out. But first and foremost Hamilton Park is a family-friendly place."
The seven races at Saints and Sinners offer a total prize fund of £42,500 and include The EBF Captain JC Stewart Fillies' Handicap.
Jockeys tonight will be wearing black armbands and there will be a tribute before the first race to jockey Campbell Gillies, who died this week.