Last Sunday we discovered that there is a fortnightly Thai food fair at the Australia Asia Association at 275 Stirling St. from 10am til 2pm. We just loved it & will go back as often as possible. We found the food to be just great - best we have had in Perth, sadly lacking in authentic Thai restaurants. Food is made & sold by Thais & there were a lot of Thais eating there - 'nuff said. No decor at all, long share tables but the ambience was great & felt like we were back in a Thai food court.
It's only been going for a year so isn't at all crowded, apart from food sellers - so many with a huge variety along 2 walls. Lunch on alternate Sundays is now sorted for us.