Writing in Coffee Shops: C/D?

pointless story: when I lived in houston while working on my phd I was a regular at this one place--usually weekday mornings or early afternoons--along with a lot of other student types. it was a great place because they had a full menu so you could have lunch without having to stop working. anyway, one day I made the mistake of coming in on a Saturday around lunch time. I ordered an ice tea and started in on a book I was reading as the place started to fill up with brunchers. a few minutes later the owner came over to me, stared hard at my iced tea, and asked "can I get you anything?" there was no table service at this place. I gulped down my tea and left after that.

spoiled w good doing-work-in-coffee-shop options tbh, one in particular where i sort of know the gay-couple owners and my bf is friends with the entire staff, plus it's bright inside, busy, not too comfortable, classical music always playing, everyone else is also staring into a laptop.