The boyfriend of one of them is their manager I believe.
One is bisexual, has a lesbian lover.
And one is cheating on her husband or boyfriend. (Her lover assaults her husband/boyfriend.)
I also remember a crazy cross-dressing guy who got rejected by another man and proceeded to behead him, and goes on a murderous rampage on everyone in his home.
The movie is very cheesy, practically poking fun at itself for being just that.