The classic Philadelphia International Records song by Billy Paul, Me and Mrs. Jones, is about a rendevous every evening by two cheating spouses. The inspiration for the song was a couple who met every evening and were frequently observed by Gamble and Huff of Philadelphia International. The Merriam Theater was originally called the Shubert Building, after the Shubert brothers who owned many Broadway theaters. Philadelphia International had its offices in the building. In an interview with Terry Gross on NPR's Fresh Air, Gamble and Huff said this about the setting, it was a little bar downstairs from the Shubert Building, where they used to have their offices (you can find the transcript online). To me, that sounds like it was in/under the Shubert Building, but I suppose it could also mean in proximity to it. If anyone knows for sure, please comment below. [The title of this posting used to be framed as a question, but we found better info, see comments from Nov. 2017, below. The Pennsylvania business search site shows both Boot's Stage Door, and its owner, Boots (sic) Towne House, Inc., at the 248 South Broad Street address. www.corporations.pa.gov/search/corpsearch. - Editor.]