I call this photo "Pajama Party". Five gals sharing whatever was in a chafing dish and a pie plate. It looks to me like the curtains in the background were hung on springs. ( Lots of folks used them up here in place of a curtain rod..they were flexible and could be hung anywhere) It looks like there are newspapers or advertisements hung on the wall..this could be insulation at it's finest! I love the patterned robes and can only imagine their bright colors. Oh I am not sure about a year?? 1920?