What was written on the paper when the waitress said it was my treat while drinking in the bar?

"Red Circle"-The red circle is the club where the boss places his son in the film.

By the way, their bar is the bar of the killer hotel. The whole killer hotel is a huge and authoritative behind-the-scenes organization. On the one hand, it can be seen from the efficiency of obtaining information by all parties. On the other hand, there are strict rules, one of which is that no one can kill people in the hotel (all rooms in the hotel are big windows, which feel like they were opened on purpose), but the club where boss put his son (red circle club) has no such rules, and John can be in it.