[URSpider94]

Off the top of my head, I would suggest:

-- restaurants that do a lot of take-out or delivery business (pizza places, Chinese/ethnic restaurants, lunch places in financial districts of major cities). When people want delivery food, they need a menu on-hand.

-- restaurants near colleges/universities. High usage of smartphones, lots of eating out.

-- restaurants in areas with particularly high smartphone market penetration (Bay Area, New York City, Boston, Seattle)

A good menu/take-out order system for restaurants is something I've been thinking about on and off since I was in grad school (and that's been cough over a decade now).

[cmeranda]

Great suggestions, thank you. Would love to target the Chinese takeout market, that's spectacular, although the restaurants we've spoken to so far in that corner are somewhat frugal/take more convincing :)