A lot of people meal prep for the entire week. Restaurants could fill in for that.
Something like https://www.eatclub.com/ but for home, and delivered in bulk.
In frugal times, going to a sit-down restaurant is insanely expensive compared to a good at-home meal. A typical sit-down restaurant is like $60 per person including tip/tax with an appetizer and drink. For that, I can eat all 20 meals for a week if I shop sales.
The first link I found on Google [https://minnesota.cbslocal.com/2019/05/16/survey-shows-how-o...] says that almost half of Americans basically never dine out or do take out. Only 10% eat out in any form 4-6 times a week. So there's definitely space for something in between for the home consumer.
Where do you live? We typically pay $30-$40 for a particularly nice night out at our favorite restaurant. Cheaper stuff runs more in the $10-$25 range. And we're in Boston!
Our local restaurants also jumped quickly into selling meal and beverage kits alongside single takeout/delivery meals, and breweries expanded shipping options to serve individual homes. Meat and vegetable farms too, most of which already had the infrastructure through CSAs/farm shares.
A restaurant could sell 10 meals worth for 10 * original_price * 0.5 and make more per order plus use up more ingredients. Farms could sell cheese by 5lb packs, eggs by the dozen dozens, meat by 10lb packs, etc.
It's not worth the whole ordeal of going to a restaurant to get a small portion of food, pay the same price as a sit-down experience, and be hungry again in a few hours.