I used to swipe cocktails and beers to get drunk. Or get someone to buy us beer and get loaded on the board walk (Before all of the security). Then try to pick up on older chicks or young sluts Now i just drink till they look good and make a fool of myself.
we used to hit up our racing teams cooler and drink a bunch of their (our) beer while they where out at the bar if we couldnt get someone to buy us some. we usually stayed at harrahs so we would also spend tons of quarters playing the rally game they have there. once, a buddy of mine was flipping through the channels and got some porn, well much to our (his dad's) surprise, at checkout, he was billed something like 60 bucks for it. hehe.
I'll tell you what the under 21 crowd can do in Laughlin if they get bored . Once you get off the freeway and take that long twisty road into town you'll pass by the Avi Indian Casino . In there parking lot theres a little store that looks like a AM/PM mini market type of place . Inside it's actually a fireworks store !! You name it they got it !! All the stuff you can get in Mexico and more , and its not the crap thats made with old newspapers too ! You can't take it into town , but you can light em on reservation land near the river. They get pissed if you light stuff by the casino .
I know some casino's such as River Palms have wristbands for people who over 21 so they don't get carded all of the time. You can have someone who is over 21 get a wristband and then you can get it from them if you can get it off their wrist without breaking it. It worked for me until I turned 21.
If your going to be partying do it safely and responsibly.