Yes BF is very good about finding people to show off their bikes and let you test it out.

I would also highly recommend Warm Planet Bikes. I was very close to buying a bike from them when I was in San Francisco but they refused to ship it to me because they felt as California citizens it was important to charge the sales tax! I was very impressed.

Only thing is they're closed on weekends and have a lot of commuters at rush hour as they also function as a bike garage.