Ari, are there local yacht clubs that have a weeknight or weekend racing
program? Most do, and there are always boats that need crew, especially in higher winds or bad weather
(hot or rainy or cold).
Be there, typically an hour before race start times for local races, dressed to sail in boat
shoes, and either ask "Do you need crew?" as each group goes by, or (I swear) I seen a guy wearing a sandwich board, that said "NEED A RIDE" on the front and listed his experience on the rear. And he got a ride, in an overnight race wher esomeone was short crew and the wx was turning heavier than they'd expected.
Be honest about your skill level and any relevant points that people might see as positive. Print up some business cards or post cards on your computer that have your name and number, and the same information (keep it short!) and ask folks if thye'd take one and keep you in mind.
A lot of folks get started that way, bumming rides on boats that are short-handed and then working up from there. A lot of "good" crew are just unreliable and the guy who can show up on time, consistantly, for a whole season, winds up becoming really good crew.