Originally Posted by frogblogger

Very strict laws governing the employment of foreigners in Thailand, so most farangs (foreigners) either own the bar themselves, or employ Thais. Who cost next to nothing to employ anyway. Casual work of the type you are seeking will be virtually impossible to come by.

There are visa issues too - you can't just turn up on a tourist visa and expect to get work. Pretty much the only 'casual' type of employment is in teaching English - poorly paid, and the more reputable establishments will require TEFL and/or a degree.