Badminton is definitely big and if you drive anywhere in the countryside in the early evenings you will probably pass quite a few people playing beside the road, swatting a shuttlecock back and forth amongst all the dogs and chickens and families eating durians. Interesting point about swimming. I was on the Chao Phraya Express one day when a very large gaggle of tourists kept piling on well after the boat was full at one pier. When it started getting scary, one loud Farang (me), shouted: Kit waa dtem laew khrap (I think that its full already) and when the guy at the back didn't do anything to stop them Rua dtem gern bpai laew! (It's too full already!) and finally for good measure Kon Thai mai dai wai naam khrap! (Thai's can't swim!) The people who came over and thanked me for being willing to speak out agreed that hardly any Thais can't swim but added that most Farang can't either so we would all probably go to the bottom together.