You can do a border run at any time. Your current entry stamp expires as soon as you leave and you get a new one on re-entry (providing it's your first border run)
Anonymous participant Have you spoken to your gym about this? To me, engaging in any competitive sport I would see as "working", and any earnings would be subject to taxation. Perhaps it's all done "under the table" in the same way as foreign musicians
Anonymous participant It depends on which visa each individual is on and the conditions attached to that visa. Even people working voluntarily for foundations need a work permit and a specific visa which allows this. Most foreign musicians playing in nightclubs and bars probably don't have work permits either and are paid cash in hand. It is what it is, and I'm only stating the legal position
Anonymous participant Irrespective of what other people are doing, if you "earning money" you are working, hence you are violating the terms of your visa. That's how Thailand operates.