His girlfriend, Trixie Trotter would sing on the stage in the speakeasy, with Cue Ball at the piano, Matches guarding the door, Zane working the bar, and a croupier running gambling. Two months later, Tannen opened his underground speakeasy, El Kid, beneath the Sisters of Mercy Soup Kitchen. Kid Tannen ran a speakeasy business that was destroyed in an explosion in May or June of 1931 by Edna Strickland. In 1928, Arthur McFly started working for him and he became a mobboss and got number of his gang to his dirty work for him. Kid Tannen was born in 1909 to 'Mugsy' Tannen and his mother Gertrude Tannen in Hill Valley, California, it's implied that Kid learned how to greedy from his mother Gertrude Tannen, and how to be a dangerous moboss from his father 'Mugsy' Tannen.