Self reply to help out this thread to take off
While traveling I took the habit of never relying on wifi as I got disappointed/annoyed too many times. So I would always try the wifi wherever I go & trust my 3G (using my smartphone hotspot) as a reliable fallback solution. Pai cafes & restaurants did have very casual cafes/restaurant with actually good & reliable internet.
There is no more co-working space in Pai (Mergespace was closed), however you can work from those places:
Cake Go “O”: a bakery/cafe located in the centre of Pai, here exactly goo.gl/maps/5LrNz7khTEQ2. It’s quiet, has lots of comfy seats, open from 10 til 22, has good coffee & even serves food, finally it has a good wifi. Only thing missing are tables that are high enough, just got to work with the laptop…on top of your laps.
Thien Art Space: a café/restaurant & art space located a little bit outside the center of Pai, here exactly goo.gl/maps/9KVzHsyARtQ2. it’s very quiet, has lots of comfy seating options, has good coffee & good food, & has good wifi. They even have desk-like tables, so you won’t be breaking your back
Pai Siam: a restaurant located in the center of Pai, here exactly goo.gl/maps/gAJFsuXGeVt. There is a quiet area at the back of the restaurant, it’s quite small & cosy. It has comfy seats, and a selection of drinks & food. I think it’s open until 22:00. Wifi was good & reliable.
Staff was super nice in each of those places. Each place comes with a different atmosphere so at least one of them will please you I suppose.
Looking forward to read other DN’s tips!