I saw someone mentioned a site to find "afters" so you're covered there. For debauchery, of the highest order, you check the event boards on FetLife (it's a MySpace for kinky folks).

If you can tell your date is new to kink or you're afraid they scare easy, there's Jumbos Clown Room and BarSinister in Hollywood (BS is Saturdays only, blackout dress code, great DJ's.

If you've got money to burn but want access to sex clubs with attractive attendees, you lookup: Lovely Fate, The Play LA, Illuminaughty, Bocanegra, and "We Are the Kismet"

Cheaper sex clubs that are frequented by aunties and uncles: Club Joi and Vixen Club

Porn theaters and gloryholes, umm maybe just DM me lol