How to play the worst maniac I've seen?

[sx3_turbo]

I'm at the Party 1/2 6max. One guy, admittedly drunk, through 50 hands is 90VPIP and 82PFR. How do you approach a situation like that. Everyone else at the table has loosened up considerably since he's been 3-betting 26o and such. I tried to loosen, but didn't hit a flop. In something this unpredicatble, it seems you will win big or lose big. Is it worth staying in this situation and how would you approach it?