there is a spanish song from the 80s..........very popular at the time.............it is called 'fiesta de los maniquies'..........party of mannequins..............it talked about pubs in the 80s and fashionista's snooty attitude, so en vogue then.............the title of the song became some kind of fixed expression among people of my generation...........we use them whenever things seem to be staged and carefully arranged.......when people are posing (un)intentionally.........when everything is perfectly balanced...........it can have a positive or a negative connotation............here your fiesta de los maniquies has a totally positive meaning............