Excuse me? Whether it's one bill or multiple bills the server has to remember who had what in order to bill them. Most POS system track different people by what seat they are, but that's up to the person punching in the orders to identify.

These women were competing to see which one of them would get a call, so they would have written their number in a way that identifies them so presumably they wrote their numbers on their orders. I think it's really weird to assume it was all one bill though. When I hang out with people the bills are generally divided unless someone asks for a single bill, perhaps it's different where you are but thats very much NOT my experience that is like a grocery bill with just line items and no separators. Again thats very much NOT how POS systems generally work.

I know a lot of people who work in kitchens and so ive heard a lot of complaints about how dumb ass servers can't remember who anyone at their table is and have to constantly reprint bills because they keep fucking up who has what. That's a really common complaint when my friends are talking about the quality of the other people they work with. This is from again multiple people who have worked in restaurants for years both in front of house and back of house.

If we are talking fine dining the servers are often expected to be VERY good at remembering details about the tables they are serving. The quality at Michelin star restaurants is often even more rediculous as to how much they can tell you about the table they just served, depending on style of business. I was briefly in a little nothing band and our drummer was a server at such a place. They were absolutely brutal with the servers and sent home multiple people each service for things as stupid as their shirt was not perfectly tucked in for more than 10 minutes before getting fixed. The way he described it there were 3 or 4 extra people just waiting for someone to be sent home every service. But I'm not expecting that level of attention to detail when I said decent server. I'm actually using a fairly low bar of basic competency, but not some fast food cashier

I also have worked with a person for the last 8 years that does mystery shopper and sometimes has to judge exactly what a server does. Associating who ate what and who ordered what is entirely expected. It's common for one person to order for another and it surprised me to learn that that's not even something most decent servers are expected to have any problems with. Pretty routine and he doesn't fail people too often for it, assuming he's not bullshiting me, which I'll admit is a possibility with him but I don't think that's whats happening

I really don't understand what your problem is with my comment, It wasn't meant to be argumentative.

Extrapolating I did make some biased assumptions sure but there weren't a lot of details in the post so I kept it pretty loose. I presumed they were all flirting with the server so that would make it more memorable for them. The fact that every one of the guests wrote their phone number at that time also would increase memorability of that particular table.

Good servers remember faces, how the fuck is that a surprise to you?