Dining at the bar in Las Vegas

It looks like some people are already planning on places to eat in Vegas for Comdex. Since I'm going alone, is there any places that are single-diner friendly, perhaps dining at the bar? Somewhere with a good wine list, but not necessarily phone-book sized. Not snobby or too dark and romantic. I don't think buffets are considered single-friendly, if you get up for seconds, someone is liken to clean up your table and give it away! Thanks.