This looks to be a photo of a photographer’s crew posing inside their photo gallery, as the door reveals. What’s interesting too is the format of the picture. This may be an early example of real photo postcards. The dimensions and round edges are similar to a cabinet card but the photo was printed on real photo postcard paper so it’s flimsier. Maybe the photographer was exploring the new format with this picture. I’d date it to around 1895-1905.
I also think this room served several purposes. It was used to show off their work on the walls, but with the piano against the wall it could have been a waiting room as well as a room used for social events. By the piano there’s a beautiful profile portrait of a woman I wish I could see better!
Someone also took the time to identify everyone on this picture, starting from left to right. I digitally took the pencil numbers out from above their heads but here goes the list:
I haven’t researched the names yet, but I hope to do so. Maybe I can find out what studio this was, or at the very least in what city it was located.