I paid for burgers at Five Makes with bitcoin (obviously), but it was quite tricky, because I didn't have a cell signal. In the end I had to connect to their WiFi.

nostr:nprofile1qqs254dy0xkkjdxsl4u08k7cs52u689q67s3pqfwwyfcp4va7avcjdgpz4mhxue69uhk2er9dchxummnw3ezumrpdejqzxrhwden5te0d35kw6r5de5kuemjv4kxz7fwvdhk6qg0waehxw309ahx7tnnw3ezucmjuuqkn2 nostr:nprofile1qqs2n79n72kpnnqx65v5m5dvjv2dgaq6p9mhg3ycv4feymv3v5vpv3cprpmhxue69uhhqun9d45h2mfwwpexjmtpdshxuet5qyxhwumn8ghj7mn0wvhxcmmvqyt8wumn8ghj7mn0wd68ytnrd9ax6ctj9ehx2aq6ernfu

The one thing that would help is to have a QR code for the WiFi, that would speed up the experience a lot. E.g. use https://qifi.org/ . Doesn't need to be fancy, just print it on paper and they can have it at the "bar".