April 13 thru April 16th or so, Songkran will take place. Water fights, super water pistols, etc. If you like girls in wet tee-shirts, its the place for you. Both the streets outside Nana Plaza and at Soi Cowboy will be battle grounds. (Be aware of possible dirty, unhealthy water.)
Its all in the name of celebrating the Thai New Year.
(photos from Big Mango archives)