At Steppenwolf after virtually every performance, there is a talkback generally led by a staff member with cast members occasionally participating. After the performance of Straight White Men that we attended, some of the cast remained onstage and with a moderator that exact speech was delivered to the audience members who chose to stay.
The Upstairs Theatre has 299 seats. The show we attended was probably sold out. I would estimate 30 or 40 people stayed for the talkback that particular evening. I'm not 100% sure but I believe Elliott and Will did participate in that post-show speech and talkback discussion. Afterward the moderator and the participating performers made themselves available for anyone who wanted to engage with them one on one.
For me and my partner, that whole package of the pre-show, the play proper, and the speech/explanation/talkback/discussion made the whole evening a worthwhile experience. The pre-show was a little head scratching (although I never felt uncomfortable) and the play was slight. However, the speech and talkback at the end gave us a good understanding of what we had just experienced. However, only 30 or 40 people out of 299 stayed for that final part of the show.