Popularly nicknamed as city of peace, capital city of Nepal, there are lot of cafés to visit. Himalayan java coffee near Thamel
Cafe mitini at Lekhnath margh
Roadhouse cafe at Jhamsikhel
Cafe Nina at maharajgunj road
Dhokaima cafe at old town. Will share a Tripoto article posted by a traveller on cafés at Kathmandu. See if it is suitable for your travel. https://www.tripoto.com/trip/hippie-shops-cafes-in-kathmandu-nepal-trails-ep-07-dipen-5dc03fef90c24