That's a Hang Up. I love double hangers for hanging pants and shirts together as well as skirts and blouses. No need to buy those expensive "piggyback" hooks, just pop a soda can tab and use that. Sodas Tabs, Pop Bottle, Small Closet, Poptab, Closet Spaces, Sodas Cans Tabs, Pop Tabs, Pop Cans, Clothing Hangers
Use soda tabs (aka pop tops) to hang a second hanger from the first hanger.