Get off the Strip and go somewhere that is un-pretencious, affordable and fun. That would be Firefly. I have been coming here for years and am a little sad to say that too many of my industry associates have discovered this hidden gem.
I come to Vegas several times a year on business and this is my go-to place to get out, relax and NOT see anyone I know or work with in my industry. I guess that you can't keep a secret for too long, as I always see people I know here now. Even so, I won't stop coming because of it, although I may go to one of their other locations further outside of Vegas?
I cannot pinpoint any one item on the menu that I love more than the others (except for the Stuffed Dates, which simply ROCK), but just take some friends, order 6-10 tapas plates, get a few pitchers of Sangria and try not to look surprised when the check comes. Its half the cost of anything comparable on the Strip.
A real treat for a small-business owner or someone on a tight expense-account. Go check it out!