Watch Online Free on Watchseries. On 19 March, 2009 Eric Clapton joined the Allman Brothers Band on stage at The Beacon Theatre in New York City for the first of two historic guest appearances. Other guests that evening were Susan Tedeschi and Danny Louis of Gov't Mule. This year marks the 20th Anniversary of Allman Brothers Band performances at the Beacon and the 40th Anniversary of their founding.