I would play one more gig. But I would also try to get another gig set up for a date in the future if possible. At the present gig, right when things are going good, pass out flyers promoting your next gig at the different location and mention the current location doesn't want you or your fans there any longer. If nothing else, it would separate those that come to see you guys, and those that only go to THAT particular bar for other reasons. Plus, it'd be fun listening to the current owner bitch up a storm.
But I don't know present bar/band scene around there. It could also be suicide to do that. But it sounds fun.