In response to a question about nightclubs, here is some, hopefully, helpful information.
Bottle service is when a patron buys an entire bottle of liquor rather than paying for a drink at a time. You may still be charged for the mixers, but if you know that you or your party will be drinking a lot of one type of liquor, this might be a good choice. The bottles are substantially more expensive than what you could buy at a liquor store, but then again, individual drinks are also easily $8 - $15 each. Many times you also get a host to take care of making your drinks for you. Purchasing bottle service usually waives your cover charge as well. You may want to ask about that.

As for what nightclubs are best suited for different age groups, you can look at http://www.vegas.com/nightclubs/ to see details for of each nightclub. It also details what sort of music is played etc. I don’t actually do a lot of clubbing, but I will try to visit a few on my next trip.

Another tip is that many VIP / front of line passes are available on eBay for very cheap, like $1. I know that also if a club is trying to get patrons, they may hand out the passes occasionally for free. Once, as a friend and I were walking through Treasure Island, we were offered VIP passes to Tangerine. They also give out passes to Coyote Ugly on the Mezzanine at New York, New York frequently. Also ask the concierge at your hotel.