Zurich have one of the biggest gay scene in Switzerland, but to be honest, I think the gay scene is pretty much the same in every big city. The variations might come from the mentaliy of the people, which you might find it in the forum. The crowds are comparativly more "NICE" that others scene.

To me, compare to the scene in Berlin, NYC, Amsterdam... the gay scene here is less interesting, and less diverse, you dont find bar with specific theme, and in the bar you mostly see only European looking people, almost only one type, one style. I have non-white friends being asked in a gay bar "how much are you?" in Zurich.

Always, gay bar/clubs have the best music for dancing.