Hi Tuan,
I'd love to see this evolve into a powerful feature inside Event Booking.
I'm not a coder, my skills are more or less limited to cutting, pasting and testing...
...to add some complexity; at my "somewhat remote venue" I also have drop-in events (with unlimited capacity) where the status should be green no matter the number of bookings made (which btw are optional)...
Rgds,
Petter