I never felt more like a waitress in the sky than I did on the Friday night flights from Phoenix to Las Vegas. Sheesh. A plane full of people wanting to start the party early. Guys buying drinks and asking us to give them to girls on the flight, people being loud, making plans on exactly what they're going to purchase with the million they're about to make on the slots.
The flights out of Vegas were different. People wondering why they'd gambled so much, newlyweds and the sleep deprived. The one constant was the alcohol. I don't think we denied people entry to the plane anywhere other than Las Vegas. I think people forget that one drink on the ground equals two in the sky (because your blood thins in the altitude). So if you're drunk already before boarding, you'll be super drunk during the flight.
If you do get kicked off a plane, luckily you're in McCarren. HUGE. It always struck me as funny to see people land here for the first time and be shocked to see slot machines in the airport. Yup. That and porn handed out to you as you walk out. Ah, Las Vegas.