It's called Mad Mad House, and the twist (or one of them, rather) is there is a core group of "alternative lifestyle" folks (called Alts, for short) with whom the contestants interact. The alts are the ones who decided who stays and who goes, apparently. The guests/contestants are "normal" as I understand it - or as normal as anyone who wants to be on a reality TV show, at least.
I haven't seen the show - no cable, or I'd never leave the house - but the web site is fairly entertaining. The alts (can't bring myself to capitalize it, though the site does) consist of a naturist (nudist, raw foodist), a modern primitive (tattoos, piercings, suspension), a wiccan/witch, a voudun priestess, and a practicing vampire.[*]
They're in week 2, I guess. I am amused. That line between the ridiculous and the sublime gets thinner and thinner...
[*] The snide part of me says "of course he's practicing, because he's never going to get there!" which is all kinds of disrespectful, but I guess that's my personal bias. Skimming his bio page makes it sound less undead-superpowers and more like energy work with the an it harm none portion of the tenet discarded.