Avennu
http://www.avennu.com/Unique Locations for Creative Professionals
Avennu is an online directory and booking system for event and exhibition spaces around the world.
"Hosts" list under-utilized, private spaces such as community halls, outdoor venues, and scenic backdrops. "Organizers" search locations for events such as private ceremonies, art exhibits, and corporate meetings.
Some have said it is like Airbnb for creative spaces.
We say, "where's the party?"
Angel list: https://angel.co/company/avennu
Member count: 1-10