Hey bud,
The line ups are pretty crazy one weekends, at Tao there was probably like 500 people in line and I got in, in about 15 minutes. The thing is there as opposed to here they don't "hold the line" to make it look super busy because it is crazy everywhere on weekends. They just want to cram you in so you can start buying 13$ beers and 15$ highballs.
I don't know how old you are I am in my early twenties. I have been to Tao, Tryst, Pure, Bank, Jet, Prive, LAX, XS and all the clubs in The Palms (moon, playboy etc.). Most of them you have to get pretty dressed up for. When I went to Tryst everyone was typically in a blazer, dress shirt and dress shoes.
Bottle service is pretty sweet, the host usually funnels women to your table if you order the premium liquor (grey goose, dom perignon, and patron) with a fat tip. He basically just brings like 10-15 girls and you get to pick and chose which get to come up and drink with you. Personally I enjoy to go on the dance floor and find my girls there, so most nights the table service was just to get drunk and put my blazer down. But for those shy guys- bottle service will do you wonders.
But I guess if you are asking me which club you would go to... I would say in no particular order XS - sweetest club ever, The Bank, and Tryst. Tao was pretty good but way too big, I was probably overwhelmed for the most part. The crowds there are pretty young and pretty wild- all 25-30 year olds from California.