Depending on just how wild your time in Las Vegas is, you may need a lawyer. Yes, there are actual laws in Las Vegas. Some of the surprising ones include; prostitution is illegal in Clark County (however it is legal about 20 minutes south in Pahrump), open containers in vehicles are not allowed, and running down the Strip wearing nothing but one of those hats with beer in it is quite illegal. Participating in any of this may lead to an arrest. Luckily there are hundreds of lawyers waiting to get you off for time served or a bit of highway cleanup in one of those nifty orange jumpsuits.
For a comprehensive list of attorneys in Las Vegas listed by which area of law you need help with go here.