When I went, he was kind enough to stick around for everybody waiting (maybe 10 people?). He signed and posed for photos. We waited out on the street by the main door that leads to the downstairs theatre. You can wait indoors as greenifyme did - the actors do come through the main lobby, so if they exit soon after the show ends, you can meet them there. But if they take a little while (as they did when I saw it) you'll be asked to wait outside, since they have to close the lobby.