I was once at 'The Holy City Zoo' in San Francisco, a defunct comedy club where Robin Williams got his start. In any case there was a comedian on who was from Bladensburg Md, which is a city adjacent to Hyattsville. When i told him that I went to HJH he said, "So, you were training for Jessup." Jessup is the Maryland State Penitentiary. He wasn't far off as you have surmised.