try out diablo's cantina.. it's americanized mexican food, and it is fun..
If you really want something fun there is a cheap restaurant at the sahara where they sell beer towers, and some of your guests would have a chance to eat a 6 pound burrito...
My thoughts are that there is not a very good Pizza scene in Las Vegas... I thought I would share some of the ones That I think are very good...
Metro Pizza metropizza.com
Good pizza, and Ok environment.,...
Amore Taste of Chicago
Good Chicago style pizza, great italian food..
Mannie & Bo's mannieandboslv.com
Great Pizza, great calzones (no one else makes calzones here??)
feel free to add more, I always love to find great pizza