The succubus/club thing reminds me (as in it was done) of Laurell K. Hamilton where some vampires could feed via other things like fear or lust, so they might own businesses that draw out those emotions.
It's right there though I won't have time to put up all of the info before I leave this morning. I'll work on it when I get back. In the mean time, think you can round up everyone who showed interest but didn't drop out yet?