I'm a bit new to the whole biking scene, and hoping to get some friendly tips. I just got a job in downtown SF and for most of you, you probably know how driving and parking is like there. So I plan on commuting through bart and by foot/2wheels. At the moment, I do not completely know what I want in a bike. But I know I want a road bike and I was thinking about a single speed and a friend suggests a fixed bike. I heard something about a flip flop thing and I just wanted to know how exactly it works. I kinda have a general jist of it, but I'm not totally 100% sure about it. But all I know is that I'm going to stick to having brakes, no matter what people may say. (I'm guessing there's a brakeless hype) Any suggestion on a bike? At the moment, I'm just looking through craigslist for a cheap used single speed, hopefully I can get a decent deal because I'm on a VERY tight budget. Anyways, any tips or suggestions would be great. Hopefully, I'll be welcome warmly. Thanks.