In terms of post-show, it’s quite common for shows to do a bucket collection for a charity, especially if the play is related in some way, and that’ll usually be introduced by the cast. A small thing, but it keeps you thinking about the meaning of the play for a little longer.

A Christmas Carol at the Old Vic does this, and also has a great pre show experience in the auditorium with mince pies and oranges being handed out, and some of the cast on stage.