Be sure to look at the E-mail list. I don't know of any restaurant that specializes in Irish cuisine. The following places serve Guinness on tap and offer American menus. The following are my favourites. Music is not Irish.
Service is good.
Reasonably priced food. Live traditional Irish music nightly. Feb.'01 Maggie O'Brien's 2000 Market St. Maggie's has a full menu of entrees and appetizers at reasonable prices. Sometimes has Irish music.