It's amazing how slow and inconvenient QR code menus are compared to a proper mobile app or even better, a laminated paper menu.
A mobile app takes at least a full minute to authorize and download and install over a cell connection. And I sure don't want to install a new app every time I go to a restaurant.
A laminated paper menu often takes several minutes for the server to bring around, or worse.
QR codes are literally the fastest thing around.
I suppose there's some middle-ground "seat yourself" style ones but I can't recall any recently.
Pretty common for restaurants not to have a host, you just ask a waiter nearby and they tell you to sit anywhere you like, and that someone will be by to serve you.
Hosts are expensive and NYC restaurants are often quite small so it's very common not to have them.