A: Hi AD,

Thanks for your question.

Yes, you can invite 20 team members to brainstorm in a private workshop if it is within your Tier limit (this case would be Tier 3 with unlimited members).

For more info on public and private workshops, you can checkout this article https://www.excelway.co/help-center/private-and-public-workshops/ or this video https://youtu.be/dO7JTLELHGQ?t=195

I hope this answers your question.

Best,