Gymbox's inside joke

This might seem like a pretty straightforward situational advert, but the little joke that GymBox shares with it members will help retain them and attract new ones.

Everyone loves to feel part of the crowd, especially the "in" crowd. So if you are member of the gym, firstly you feel that this message is aimed directly at you as it says "a" member, and secondly because you understand the joke it makes you feel part of something exclusive. Vice versa, if not a member you might feel left out, and so want to become part of this "in" crowd.