The Gym instructors, bartender

Nick Nelson is 20 , he works as a gym instructor and a rugby teacher.Charlie spring is a bar tender and an 𝐸𝓃𝓉𝑒𝓇𝓉𝒶𝒾𝓃𝑒𝓇 (if you know what I mean) at the local club/bar.
Nick and Charlie had never met which is strange since they were at the same school for six years.
Anyways , Nick has never really payed attention to others around him when he's at the gym . That's until Charlie started coming to the gym, Nick started to get concerned as Charlie would come very often, like an unhealthy amount of times . Charlie was already quite thin and Nick was worried about what all this time in the gym was doing to his body, Charlie thought the complete opposite.