Ultimate Jam Band

    It’s one thing to play the music of the Allman Brothers, but quite another to have a member of the legendary Southern rock ensemble sit in with you when you do. That’s what will happen at Guild Hall when the drummer Butch Trucks, a founding member of the group, joins Great Caesar’s Ghost onstage for shows on Monday and Tuesday starting at 7:30 p.m.

    Great Caesar’s Ghost is a seven-piece band out of Bridgehampton known for extended instrumental jams, particularly when covering Grateful Dead and Allman Brothers tunes. Long Islanders all, they’ve been around since 2004, with players familiar to the music scene here: Peter (Bosco) Michne and Larry Schmid, both on guitar and vocals, and Larry Hunter on bass. (Jerry Weldon, who plays sax with Harry Connick Jr., will be sitting in, too.)

    Their latest release, the two-disc “What’s Done Is Done,” much of it recorded live, is number four on the jam bands chart (jambands.com).

    The concerts benefit the food pantries of East Hampton and Sag Harbor. The cost ranges from $69 to $99, with V.I.P. seats available for $225, which includes sushi from Sen, an open bar, and a meet-and-greet with Mr. Trucks after the show. Tickets can be bought online at greatcg.com or by calling 866-811-4111.