Thanks for summarizing these, Kelley! It's super helpful. My 2c...
When we were entrepreneurs and served a luxury market, we made a point of experiencing luxury so we could understand better what our target market wanted/needed. Hence, I'd be a big fan of the Stanley beer garden (not just as beer drinkers, natch, but to practice observation/interviewing techniques, etc.). We could have a follow-up meeting where participants could share what they observed/learned/etc.
Alternately, style guides/design systems seem to be a hot topic right now and discussion could be fruitful.
Cheers,
Bill