I hate that there's no equivalent term for "sausage fest," so I'll suggest one: "clam bake." As in, you call your friend from the bar and say, "dude, this place is a total clam bake. You need to get here immediately!" (Curmudgeon's note - I'm aware this never really happens.)
Anyway, I ran this by my friend the other day, and he said, "yeah, but that has a smelly connotation." And then I thought, yeah, but they often do . . . smell . . . vaginas, I mean. And clams. So it works on a whole 'nother level. Clam bake. Pass it on.