We love the adult pool at Flamingo (nothing like a pitcher of Mojitos brought to you in the pool)... a day there will get your sunning taken care of
Freemont Street is a nice evening (Summer of 70's promotion on now)... Try the Fitz and 4 Queens (great pool here as well)
Love the Toby Keith Bar at Harrahs (drinking from a mason jar)
Happy Hour Food is great over at Nine Irishmen Pub in New York NY (they actually brought the pub over from Ireland)
Try the Gourmet Ice Cream Sampler at Mandaly Bay (r&c?) $25 for 16 ice cream samplers, feeds two (if you can name the flavors you get the dish for free)
Best Steakhouse - The Range at Harrahs
Best Buffet - Rio
If you got little ones in tow be aware of the "pleasure pit" concept that is everywhere... basically pole dancers at the gaming tables... usually right by the front door!
...and finally (NOT my cup of tea here)... if you like thrill rides the insane people at the stratosphere will strap you into three rides some 90 floors above the ground that zoom out over the edge of the building!!!!