Johnny D's is a Boston institution owned and operated by the DeLellis family for 36 years. On any given night you may see Cajun fiddle masters from Louisiana, British folk stars, or some of Boston's finest rockers...
The special thing about Johnny D's is their daily live events... but I have not been there for those things. The food is very good. In particular, the weekend live jazz brunch is one of the best breakfasts (heck, the best breakfast) in the square, in my opinion. Great blintzes. I like the oatmeal sides that include brown sugar and raisins. Mmmm.