It's not in Boston, but just across the river in Harvard Sq. is Charlie's Kitchen. You can take the T red line to Harvard Sq. if you don't have a car or don't want to drive.

http://boston.citysearch.com/profile...s_kitchen.html

It's not fancy, but the food is really good and cheap. They have a huge selection of good quality beers too. They had Hoegaarden on tap, amongst others. I strongly recommend the twin lobster roll plate. You get two hot dog rolls overstuffed with lobster meat and a side of fries for $9.95. Got a Hoegaarden for $4.75 (but it was enormous, almost a liter I think, because my wif'e's beer was 20 oz. and looked tiny by comparison) My wife got the twin crab roll plate with fries for $8.50, which was very good, but we both agreed the lobster tasted a little bit better. You can't go wrong with either. Our bill after the certificate was only $4.09 + tip. Not bad for dinner and a beer for two.

If you want an even better deal there, visit www.restaurant.com where you can get a $25 certificate for this restaurant for only $12.50. The certificate can only be used Sun-Thurs., and restaurant.com usually runs out of the certs as it gets closer to the end of the month (they have a limited number of certs each month), but you can use the cert towards the purchase of alcohol, at least at Charlie's Kitchen. Some restaurants only allow the cert to be used towards food.