If you weren't able to get into the U2 radio chat this week in Chicago (they flap their jaws in Chicago, they play a secret show in Boston, figures), you can still rock like a self-ordained Irishman this St. Patrick's Day weekend. Elevation is one of the best U2 tribute bands around, and they're playing at 8:30 p.m. Friday at the Abbey. Tickets are $10 here.