Roast, is one of the brunch hotspot among tourist in Bangkok. It's rather affordable comparing the prices back in my town, Singapore. I hardly see any locals dining there but never was I wrong that their coffee indeed is the best in town. Oh they do serve cold brew too, do check it out on that.

For something that worth your moolaa, here's one of the option you can consider.

Brunch [✔️]
Coffee [✔️]