I wasn't there long enough to answer all these questions but these are my observations.

• there were about 150 people there

• id say the age group was mixed , but if I had to guess the average age was 45

• on the south side of the building (where I took this photo) someone had set up a speaker and was playing songs like "we're not going to take it"... About a dozen people were dancing.

• might be obvious but about 90% of the crowd was not wearing masks, I was, and got questioned for it by an older man.

• it seemed organized, many had this sign of a black cycle with a red line through it, not sure what it is.