In Taiwan, there are some excellent tea houses that have an unusual billing model. You can drink their tea for the list price, or you can bring your own tea leaves but use their water, etc by paying for time.
These are not generally the kind of places where you would bring a laptop.
https://www.theguardian.com/travel/2014/jan/08/pay-per-minut...
London: https://london.ziferblat.net/
Manchester: https://www.ziferblat.co.uk/
8p/min = £4.80 per hour. Bearing in mind I'd pay £5 for coffee and a cake in many places that seems reasonable.
UK: many public access spaces have places to sit and public wifi (e.g. central reference library, University buildings, some City Council buildings &c)