Prosperity is cool because you can go there with friends and talk without yelling over music or TVs.
A modern, broad selection of beers, ciders, and drinks with about 6 beers on draft. Excellent bread pudding.
The atmosphere is consistently old school. They typically play Turner Classic Movies on tube TVs with no sound. Beer advertising tchotchkes from the 40s or 50s.
Karaoke night is fun - though some take it a little serious - But it's all good.
A good place to relax and have a beer.