This article feels is one of the very few cases where i read something online and totally feels weird to me due to where i am from. In Greece coffee shops are really mainly places to hang out and staying for hours on a single coffee is pretty much normal and expected. There is a huge "coffee culture" here. Me and my friends would go for a coffee at 6pm (or later 7pm, due to jobs) and often leave at 11pm or sometimes 2am (note that many coffee shops, especially at the most popular areas in the bigger cities remain open from morning to very late at night and after some point they also start offering drinks). This was also one bit that i missed when i lived in other countries (i had a sort of culture shock one time when, visiting a mall a bit after work, i saw other people from work leaving from a beer outing at around 9pm or so :-P).

Laptop users aren't seen very often in general though (and TBH with how noisy the shops are i doubt they'll ever be), although i live near a university and there is a coffee shop nearby with nice flat tables looking at the street and i often see students with laptops there. Also years ago, at my first gamedev job (although before i joined) on a startup, the team didn't had offices for a few months and the programming team mostly worked from laptops at the roof of a coffee shop :-P (and AFAIK generally all meetings with the entire team and everything were held in various coffee shops around the city).

Of course all that means that there are tons of coffee shops everywhere and i remember when i lived abroad, my landlord - who visited Greece - telling me how strange he found that there were so many coffee shops.

Personally i considered visiting a nearby coffee shop with my laptop a few times (there are 5 shops just 100m range, two right outside of my place), but i always change my mind because of the noise... and because i don't like working from a laptop :-P.