Thai or Western restaurants. Ideally but not must with wheelchair accessible restroom.

Please indicate indoors or outdoors.

No experience but expect most of the better new hotels would have.

I'm not sure if Il Forno is still around, so please check for updates before going.

 

As you may have guessed, it's an Italian restaurant, which is not only wheelchair friendly, but is operated entirely by staff with disabilities (and some great abilities in making pizza and pasta). Hope you can check it out.

River Market has good wheelchair accessibility, as do the restaurants in better, newer hotels and malls.  If you know the "secrets" of Kad Suan Kaew, with regard to locations of ramps and elevators (lifts) you can even have full wheelchair access in that old mall, but it takes some sleuthing.