Fremont street experiance is definitely worth spending some time at. 3 stages with various bands. Mostly rock cover bands. Lots of "interesting" streetperformers. Famous people look alikes, mostly naked girls, magicians, statue people, plastic bucket drummers, etc. There's a giant overhead video screen, and zip lines. And an arcade with a good selection of pins. It's set back from Fremoont st a bit.
Also, Tony Roma's on Fremont has a $11.99 steak and lobster special from 9PM to 11PM. It's not the best steak or the biggest lobster, but it's pretty decent. Pop (soda) is free, so for $30, including tip, you can have steak, lobster, baked potato, and veggies for 2.
Gold & silver pawn shop (TV show Pawn Stars) is nothing special, but Rick's BBQ, right next to it has awesome ribs. (Rick Harrison, Pawn Stars). A little bit spendy, but worth it.
If your hotel doesn't have a microwave, there's a guy on craigslist that will deliver a microwave to you for $25. Just search for the words microwave and deliver. Then leave it by the ice machine when you check out. No joke. That's what we did.