I got my first teaching job at a newly-opened weekend language school in Siam Square back in 2001.
They were hiring a mixture of new and experienced teachers and I managed to get one of the jobs. It was a really nice place to work. The teachers were friendly and always willing to share activities and help you out.
The school had lots of resources and it was quite easy to generate engaging lessons for the students. I learned a lot from teaching there. I was working all day Saturday and Sunday. The money was great at the time. 700 Baht an hour! I lasted fair few years there, but eventually gave it up as I wanted my weekends back.