Sleaze Ball dancefloor

"The Sleaze Ball of 1983 was the first big one to be held at the Showgrounds," recalls photographer William Yang. "It was a time when gay men were still being arrested; there were police raids on sex-on-premises venues like Club 80. Activists battled for gay law reform but the decriminalisation of homosexual acts was yet to happen.

"So against this backdrop, revellers at the Sleaze Ball let down their hair. One felt part of a subculture under threat and people were definitely having a good time. The Sleaze Ball was sleazier then - there were spaces where you could have sex. This picture was taken in the morning when the crowd had thinned out and the first shafts of light illuminated the dancers."