(performances start on Aug. 29) You can grab a drink and flip through the songbook, but leave the singing to the professionals when the theater company Sister Sylvester stages a site-specific tribute to John Osborne's "Look Back in Anger" at an East Village karaoke bar. In this Abrons Arts Center production, two angry young men and one cranky woman sing hits by Jeff Buckley and Britney Spears as they trade Osborne's lines.