Cheers is that place where EVERYONE goes. It reminds me a little of that coffee shop on "Friends" where everyone would meet up and listen to Phoebe sing about smelly cat.
In all seriousness, though, Cheers isn't bad. Cheap drinks, decent music selection, and the fact that you are surrounded by everyone you know makes every night there great.
Personally the ambiance doesn't make it my first choice to go and grab a drink, but then again, Cheers wouldn't be Cheers without the eclectic decorating job.
I've never had the food here, although the last time I was there someone ordered some wings that smelled divine. I may have to check that out next time.
Overall, Cheers is a great place to come to have a cheap, good drink, and hang out with everyone...(LITERALLY... EVERYONE) that you know.