Soda machine? Well, specifically one that dispenses cans. Not terribly concerned over the exact style, but would lean towards retro if I had a choice. 70s or 80s-style. Wouldn't even mind if I had to have quarters handy for it.
@wildweasel in practice i find that moving the little plastic letters around is unfortunately quite rough on the fingertips, so i don’t change the text on my little sign very often…
Menu board? Specifically one of these kind, with cling letters. Sure, I'd probably have to buy extra letters, but god, I want this kind of sign to make it say dumb stuff all the time. Pointless statistics. Fees for absurd requests. Days since last party wipe.