Hey, you with the tan lines and the Corolla that's still sporting Connecticut plates. Welcome to L.A.  We know you've been talking up SoCal to all your Emerson buddies ever since you landed an internship in the WME mailroom, but now you're out here and you're trying to mine your extensive knowledge of Entourage to think of things to do this summer. One small snafu: you're not a movie star yet, and that $11.63 an hour that Ari's paying you isn't going to support the groovy lifestyle of bangin' club nights that you had envisioned. Lucky for you, L.A. is chock full of great things to do on a budget and we've got the low-down on 10 full days of fun for under $20.