It's as advertised - beer market. It's got like 500 different beers and 50 of them on tap. If you like beer, you will like this place. The prices are about as average as they come, drafts for $5-$7 on average, bottles vary depending on your taste. They have carry out menus available from local restaurants that will deliver to your seat at the bar. It's a unique concept that probably saves them a ton on food waste. Service is knowledgeable and friendly. Good spot before a Pirate game, or just for a post-work drink.
They do run quite a bit of beers through the taps and try to keep their chalkboard up to date. That's my recommendation is to look at that rather than the paper menu in front of you.