Hi Stef

what about password protecting jamm's so you don't have to mess about with access lists
And also how about adding a reserved space so if you have a created a open jam and it reaches maximum capacity
anyone on your reserved list can get in and bumps the last one to enter out “Last in First out”

Thanks for the suggestions, HighAction!

I have thought about various ways to limit and reserve slots. Sometimes it does feel like there should be a limit of ~5 users to prevent jam sessions getting too crowded. I think mechanisms that kick people through no fault of their own cause negative experiences, so I'd like to avoid that.