O'Horgan lived in a loft in Manhattan at 840 Broadway (at 13th Street) that was famous for parties and events attended by artistic figures like Norman Mailer and Beverly Sills. The walls were covered with his impressive collection of unusual musical instruments from throughout the world. His loft was visited by children's television host Fred Rogers on a 1985 episode of "Mister Rogers' Neighborhood". Many instruments were displayed in order of their history, from antique to current. There was also an alcove of gongs, including the one used in "Jesus Christ Superstar". He and his friends rang in many a New Year there, where at midnight everyone would take an instrument off the wall, or find a drum or a gong, and celebrate with an abandon and joy that O'Horgan so often set the stage for (both personally and professionally). He also held the weddings of two close friends there. Martha Wingate married Hunt Taylor there in 1980, and Soni Moreno married Harry Primeau there a few years later. Tom O'Horgan was the initial representation of a father figure to one underaged John Galen McKinley, aka. Jack McKinley who dropped out of high school and ran away from home in the rural Maryland to the big city when he was only 16 years old. It was Tom O'Horgan with whom young and handsome McKinley found not just lodging but also homosexual love after arriving alone and virtually broke in New York's Greenwich Village. The 16 year old lived with O'Horgan only for a few weeks, when he met the famous Harvey Milk and moved into his apartment only 3 weeks later to begin a brand new homosexual love affair. O'Horgan and Jack McKinley got together multiple times later in life. It was before Tom O'Horgan even set foot on Broadway and just started producing experimental plays in his Lower East Side loft and at Ellen Steuart's emerging Cafe La Mama, that McKinley was tending to the technical aspect of theater and learning the basics of stage managing. Harvey Milk would occasionally loan some money to Tom O'Horgan to encourage him to be more ambitious and take on a major production. At that time O'Horgan, McKinley, and Harvey Milk became an indivisible trio: the teenaged high school dropout, the avant-garde director, and a Wall Street businessman. By the time Tom's first Broadway musical "Hair" was being produced, Jack was hired as stage manager for the show, as well as other famous shows of Tom O'Horgan played from New York to California, including the world renowned and controversial "Jesus Christ Superstar".