I hosted a “Fun Night” for the Toronto Pinball League. Regular league night was cancelled because of the big Pinburgh competition, so I had 12 people over. It was a test of the basement to see how many would comfortably fit. The 12 fit really good, I could probably push that to 16 (4 groups of 4 playing on 4 machines) in the future.
Regular ToPL nights have been attracting 25-35 people, way more than I could handle, so this Fun Night worked really well.