“Get On Up” by the Esquires was a huge record on the Atlantic City Boardwalk in the summer of 1967. It was a perfect song for the a cappella groups that lived for the echo, with its dynamic bass part and outstanding group harmonies. It seemed like everyone in town was singing it all the time. Keep in mind that this was in the era of the Beatles, the Stones, et. al. The thing is, the Philly kids who hung out at Chelsea Avenue and the Boardwalk didn’t give a damn about the latest thing from England. It was all about soul for them, and it was the music coming from Detroit, Memphis, and in this case Chicago, that made all the difference for them. Gilbert and Alvis Moorer, with their sister Betty, formed the Esquires in Milwaukee in 1957, but Betty left the group before they relocated to Chicago in 1966. There, with a lineup that included Sam Pace, Shawn Taylor, and Millard Edwards, they auditioned for Curtis Mayfield, who made one his rare …