Ok so I have no idea about service merchandise, but I tried to look it up. When I searched “service merchandise guest service” on google, it gave me the Wikipedia page of service merchandise, and then a bunch of Disney results. So weird
It had several different names, or variations of it. Out West, it was often called
Jafco. It was a catalog showroom store that sold hard goods, household items, and small appliances. It looked like a normal "big box" store, but it was very different.
You went in and there was a giant, snazzy showroom with displays of one example of each product; toasters, Kodak cameras, blenders, radios, etc., etc. Nothing was in its original packaging. You could pick up the item and inspect it and try it out, and there was a little sign that explained its features. Employees hovered about answering questions and demonstrating the unboxed products for you. When you had decided on which thing you wanted, you tore off a little slip from the display and you took the slip to the back of the showroom to give to a clerk where you paid for your item. Behind the showroom there was a giant warehouse where all the boxed merchandise was kept.
They'd send the order slip back to the warehouse and you'd go wait in a little seating lounge nearby, smoking cigarettes and flipping through the latest store catalog and listening to lovely Muzak.
Then your order number would go
"ding!' on the light up sign in the lounge and out from the warehouse was a long conveyor belt. Your item would come sliding out from the mysterious warehouse behind the lounge, and off you went home with your new blender or camera or radio!