Caeltish, the Irish music trio led by fiddler Alyssa Barker, returns to Mrs. Murphy’s Pub. Other members are Ed Cardenas on drums and Christopher Bramel on guitar. This weekend’s music at Mrs. Murphy’s will feature Fiddle Pete at 8 p.m. Friday, the Black Velvet Duo at 8 p.m. on Saturday, and The Kelly’s at 5 p.m. on Sunday.