I have done similar to this years ago as part of group work in a psychiatric hospital...If you are going to do it at all, am not sure that genre is appropriate as the person they are being asked to compliment may not be “strong” in the genre drawn. I’d also be REALLY careful around people commenting on other people’s looks.....in fact i’d be careful with this game full stop if there is tension in the group. When I did it as part of therapy, it was a trust exercise, much thought was put into the appropriateness of the exercise for the group of people and there were multiple staff in the group to model the way the the exercise should go. Clearing the air would probably be a good thing, but prepare for fireworks....I’d do an an ejoyable group activity rather than a game which has the potential to go badly wrong.....just my opinion.