Accepted methods of payment?

Strong man was kindly asked to leave for a variety of reasons. One day I spotted one of his personal training clients and wanted to double check that she had received all the services that she had paid for, so I approached her, informed her of Strong's change in employment status and asked if the gym owed her any personal training sessions. She turned a bright shade of red and uttered out the words... "I haven't been purchasing sessions lately... Let's just say that I developed a close personal relationship with strong man." My response: "So you were giving S-E-X as payment??!!"