I'm not "cool" by any means but hanging out in cafes for hours without working still happens, I know because I do it (or I used to, before this virus). I always bring a book or a magazine to read with me and I also have my small-ish iPhone SE for HN browsing and that's about it. And I'm not the only one doing it, I almost always see other people just sitting with a book in their hands and drinking a coffee.

My gf works from time to time on her laptop while enjoying our coffee but I myself haven't had a "modern" laptop for quite some time (my last laptop is a Mac from 2009) and as such I never bring work with me to the coffee house. I agree that not having kids yet helps with this lifestyle.