Everyone who stuck around for the second half of the VT meeting felt hungry, and we ended up just over the road in Siam Square, ordering Thai food. The place was simply decorated; you wouldn't choose it for the ambience of the place, but fortunately the food was delicious. The company, of course, was first class :-)
If you're looking for good Thai food in Siam Square in unpretentious surroundings, then this place is worth a visit, especially since Thai food is a little thin on the ground around here - this part of town has probably the highest density of fast-food and western restaurants in Bangkok! The restaurant has 2 floors, so there's plenty of seating - we didn't need a reservation to get in.