You can't conduct any type business on a tourist visa you will be deported if you are caught. People have been warned that they will be deported for singing on a karaoke in clubs as it's classed as work.
The business visa you are talking about (NON-B) is designed for employees of foreign companies who are conducting business with Thai companies. Not foreign businesses conducting business alone or with each other.
In fact without evidence of this you won't even get your NON-B visa.
You can't conduct any type business on a tourist visa you will be deported if you are caught. People have been warned that they will be deported for singing on a karaoke in clubs as it's classed as work.
The business visa you are talking about (NON-B) is designed for employees of foreign companies who are conducting business with Thai companies. Not foreign businesses conducting business alone or with each other.
In fact without evidence of this you won't even get your NON-B visa.
http://www.mfa.go.th/main/en/services/123/15388-Non-Immigran...