Bicycles are usually thought of as something that kids use until they have a car. While there is some truth to this, they also come in all sorts of varieties to fit many different uses or even aesthetics.
The banana seat: popular in the late 70's, it embodies style.
The Unicycle: used in circuses and street performances around the world.
The Beach Cruiser: can be seen in many cities, especially coastal areas. Whitewall tires make for an unmatched style.