I’ve shown plenty of shots of the inside of Sig Klein’s Gym but here’s a rare shot of the exterior. Sitting atop Gruppe’s School of Music and Romeo’s Spaghetti Kitchen, Klein’s Gym was located at 717 Seventh Avenue in New York City and was hard to miss with the huge picture of Sig out front. The building is still there, if you know where to look. Wonder if the current occupant has any notion of Sig’s place?