A couple of my thoughts...
During the day...
Hit the pool scene. There are a lot of options, the MGM is solid but the Hard Rock is really money! Stay hydrated, it will keep you going into your night time fun, if you are dehydrated...you're gonna have a bad time.
Eat and drink on the cheap in Vegas...there are easy ways to do so if you just look and ask a little (which you are now).
Night...
Clubs, forget them, full of dbags and wannabe tramps as Mikey from Swingers would say are just looking around when they are talking to me to see if there is anyone more important they should be talking to.
Go to a good Irish Bar or different themed bar or even catch a good band somewhere. I always liked Times Square in New York, New York, good dueling piano bar. We killed 6 bottles of Kettle One between 11 of us and my buddy and I took home identical twins from there.
Lastly,
Take the cards from the guys handing them out. They are good for a laugh and you can just throw them away at the next trashcan. They get paid by how many they hand out and they just can't throw them away because they have guys watching them. So anyone who is trying to turn an honest buck and not slinging the rock, I believe in helping out.
Have fun and always teeter on the line of asking yourself is this legal or not?