A woman on stage holding a microphone standing by a man.
Performers are waiting for a crowd to calm down before they continue their performance
They are not necessarily performers waiting for a crowd to calm down before they continue their performance.
All people on stage are not necessarily performers. The fact that there are people standing on stage with a microphone doesn't imply that they are in the middle of a crowded performance.
People standing on stage may always be performers; people on stage may or may not be waiting for anything; there may or may not be a crowd when people are standing on stage; if there is a crowd, then the crowd may be in one of many emotional states therefore they may not be waiting for the crowd to calm; people may stand on stage before, during or after any event; the event may have started or not started or it may have finished so it may not be to continue their performance; and people standing on a stage may not be engaged in  any type of performance.