I got sick while in Laos. While waiting for my flight back to Bangkok for some "fun" I decided to eat at the buffet restaurant in the Vientiane airport. Next morning in Bangkok I woke up with stomach problems - felt really ill. I took Imodium but could not really enjoy the nightlife very much. Although I offed guys for long time, it ended up being short time.
When I returned home, I was talking to a friend who had also been in Laos. She, in fact, recommended that i go there. She also got sick, and guess where! At the restaurant in the airport!!!

So, whatever you do, stay away!