How to distinguish wedding party at the stag & doe?

Hello.


We are having a 1920 great Gatsby theme stag and doe. trying to come up with a simple but creative way to distinguish our wedding party who to ask for event information. So our guests know who's running the games etc. The groomsmen will be wearing white t-shirts, dark pants, suspenders, and a 1920s style paperboy hat. The bridesmaids will be wearing a flapper dress, but we're trying to think of a creative way like a sash or a button so that our guests know who's in the wedding party and who they can go to for games, event information, etc. Any idea?