We were staying at Bally's and spent some time at the pool. It was great! The music was loud and FUN and while there was a party atmosphere it wasn't an obnoxious/frat house/douchey/stripper atmosphere.
The drinks are SO OVERPRICED. Ridiculously so and what made me mad is that there wasn't any freakin' alcohol in it. I'm a total lightweight and I didn't even get a teeny tiny buzz off my $15 drink. My recommendation: sneak in your own. Much better and more cost effective!
The pool is nice and cool and there are plenty of lounge chairs so even when it's crowded you can still find empty ones. There's towel service at the front and cabanas for rent (that have misters on them).
Overall we had a great time at the pool, minus the lame beverages.