A whole day, which is a different animal from an evening. There is time to get past the first version of what you would say about your life and into the second one.
The shape of the day is loose: a long morning walk through the woods, lunch, several hours of quiet in the middle where people go off on their own, and a last hour together before the light goes. Twelve people at most.
Lunch is provided. Tell Jesse about anything you cannot eat and it will simply be sorted out.
How to join
Write to Jesse and say you would like a place. Numbers are small, so he'll tell you plainly if the day is already full and when the next one is.