The Allman Brothers band is set to appear on this evening’s Late Night with Conan O’Brien show. The band, which is in NYC preparing for the Beacon Theater run that opens on Thursday, may well perform a song from its Hittin’ The Note release (who knows, perhaps even the Jammy-nominated ‘Old Before My Time’). Next week, the ABB will release a live disc, One Way Out drawn from last year’s Beacon run.