@tsarstepan,
It was the first floor of a Victorian house on a major shopping street; well, major as these things go in a smallish victorian seaport city. The front room, 15 feet high, as were the rest, was the gallery space, again, a fairly large gallery space as these things go in small cities. Plus we also had a second gallery room, and used part of the rest of the place to show a few works that weren't part of that month's show (once a month openings for the first two rooms, w/ food and wine and Calistoga water/no dogs at openings. We were fine with people wandering around, just not wine taken out of the gallery, the reason we used real glasses and kept a kind of door watch. The other rooms contained our design studio and library (the dogs are playing near at the bottom of the wide and tall bookshelving. There was a smaller space, the computer room. There was also a popular turtle enclosure, sort of like an acquariam, and a space for refrigerator and food storage. Upstairs (too damned many if you were in a hurry) was the restroom and rooms full of the building owner's old stuff. People tended to like the dogs and the turtles, and sometimes us.
To be clear, that was our office, aka, gallery & studio. We both had our own homes in the vicinity.