I do think that AI signage/advertising is the new signifier of low-effort, low-skill output and that is how it will be perceived by clientele. Similar to someone just scrawling a sandwich board sign in chalk (which at this point I would prefer). Businesses will stand out from a taste perspective by continuing to hire human effort to make recognisable human output.
Writing in signs and menus in chalk has been a signal for a high quality restaurant for as long as I can remember. With photos of the food, and/or ring bound menus being the worst.
The difference between scrawl on a chalk board and a glossy menu with photos is not really the visual effect, it's the amount of effort and the virtue signalling - "my food is so amazing I don't need to make more effort than this".
But that applies to AI menus too. "Why are these horrible AI slop photos on your menu?" "Because I'm too focused on food to hand create a perfect American Psycho minimalist menu"