I love Vegas..it's one of my favorite places in the world
As far as clubs are concerned, i definately recommend 54(located in the MGM grand)..theres no cover for girls, good music, and the drinks are reasonably priced..its my favorite club..
I personally would bypass rumjungle(in mandalay bay)..i've been there twice, its tiny so it gets really packed to where you can't move, the cover is $20 and the drinks are RIDICULOUSLY overpriceed(i paid $12 for a redbull & vodka)
Definately try and get to the Hardrock hotel & casino..its my favorite hotel/casino..just a fun atmosphere..best place to gamble..