You remember as a child your parents teaching you how to ride your first bike? I do, and since then I have made it a daily thing in my life. Well they even have a cycling club at UC Berkeley. They train you in road cycling, mountain biking, cyclocross and track cycling. They even have races in all these areas. All you will need for this sport is your bike and yourself. Not a lot of money for this activity, which when you are in college, you never seem to have enough of.