I'd suggest the Mirage and Bellagio. Both of these are very close to Harrah's (the Mirage is right across the street), and are normally somewhat "touristy". Mirage has as low as 3-6, and Bellagio has 4-8, and they are both very nice places to play I think.
A pretty good reference (although it's not exactly a list of poker rooms specifically) which includes a little bit more detail on casino poker rooms is
www.cheapovegas.com
Good luck! :)
ScottyZ