Maybe like cafes that have an artist (sometimes doubling as a barista) do their interior signage by hand, sometimes in chalk on blackboard, or in neon marker...

Maybe like cafes that have an artist (sometimes doubling as a barista) do their interior signage by hand, sometimes in chalk on blackboard, or in neon marker... one could rig up something like an X-Y flatbed pen plotter, with additional axes for chalk/pen angle. That's great for a one-off enthusiast project, and make a blog post and video about it. Or, if it's instead tech industry SOP: Tie it into a subscription cloud service for updating the signs (initially free), with a tablet UI for the independent cafe manager, and enterprise management dashboard for chains of cafes with mass-produced homey feel, and also run display ads for whatever revenue, and spy on all the business's data that goes through it, to sell the surveillance data to whomever will pay. Back to the original inspiration: maybe the artist enjoys drawing the signs, and can do it in a more appealing, humanized, genuine way, so automating it would be counterproductive, at least for independent cafes.