This photo was taken in 1950 at one of the halls on the island. Where we do not know, although Whittier Hall has been suggested but looking at that hall in the photos we have on site would suggest not. The poster on the wall it is advertising dance classes at the Admiral Jellicoe. Does this help?
If you can tell us where please comment below. If you can name the people in the photo and/or tell us the occasion again please comment below.