The Cadillac Club was located in North Philly. It was owned by Benjamin and Ruth Bynum. From Wikipedia:
[Billy] Paul recalled: “[The Cadillac] was a famous, famous club. Aretha Franklin worked there. Me and George Benson used to work there all the time.” Located at 3738 Germantown Ave. in North Philadelphia, the Cadillac opened in 1965 and was run by Benjamin and Ruth Bynum before becoming the Impulse Discothèque in 1977. Benjamin booked the entertainers, Ruth handled the finances, and their two young sons Robert and Benjamin Jr. worked at the club. Benjamin Jr., who with his brother followed in their parents’ footsteps and ran their own jazz club Zanzibar Blue [and here] from 1990-2007.