How to stay grounded with jerky co-workers?

After years in corporate I recently struck out on my own to start my own business. I share space with two other professionals and an admin. I work with them on a few things but mostly I do my own thing. These other guys are both jerks in their own right. One is very rude, gossipy and a troublemaker. He's constantly pitting people against each other. He also likes to announce to everyone (including clients sometimes) that he's bipolar as if that excuses his behavior. The other is a real pr*ck. He never pes up a chance to make you look and feel stupid especially when you ask a question. His manner is extremely rude. He's a trouble maker too. I like to work hard, keep my head down and keep work relationships orderly, professional and respectful. I've rarely run into characters like this before - they wouldn't survive in a corp. environment. I will leave this suite asap but for now it's what I can afford. Any thoughts on how to stay happy and sane working with them for now?