I was there on Monday and ditto to what Jordan has said. I had a quick little chat with Danielle Brooks which was great. Cynthia Erivo was resting her voice but signed and was (non-verbally) very sweet.
All three leading ladies came out at the same time - I'm not sure if that's a regular thing. I did note on the Color Purple thread that it's a two sided gauntlet style stage door, not a long row. So if you aren't in the first row or two it won't really be possible to get a photo or autograph. So, don't skip the curtain call, but hustle out of the theatre as soon as that's done.
I like a good rhyme more than a good time