If nothing else, chicks with the fat OR the ugly going on do at least have the added benefit of built-up sexual energy. They've spent so long getting turned down by shallow dudes because they aren't Perfect 10's, they develop all sorts of weird perversions and deviant interests. Think of poking a fat/ugly chick as being the first to tap a keg full of kinky. Some of the weirdest and wildest sex I've had has been with the less-than-perfect chicks; just the same, the most lame, boring lays I've experienced have been with the more gorgeous of the ones I've done (excluding my ex, whom was both beautiful AND freaky ... but only wanted to do it once or twice a month).
As for the whole plan about ransacking the place, swiping cash, pigging out, and basically punishing a chick for being dumb enough to get drunk and sleep with you ... DOOD! Are you TRYING to get arrested for something? (Theft, mainly.)
It's guys like that whom are the reason why so many chicks have so many screwed-up emotional issues about being used/abused by pump-and-dump dudes, and why they're that much more difficult for other guys to hook up with, afterwards. Why burn bridges? Have your drinks, make use of a few Trojans to give her (and maybe yourself) a night of wholesome ugly-bumpin' fun, and part ways in peace. Leave something there for someone else to enjoy, later. Don't leave the chick all emotionally screwed up, feeling all crazy violated so that she swears off the frank n' beans forever and turns lesbo or something - that just shortens the available supply for the rest of us guys, y'know? After all, there will be other drunken dudes who might get the urge to tap that booty long after you've had your time...