The last time I went to Kon (and I will not return), I was with guests from Chicago. We arrived at 8pm on December 23rd (We went to Vieng Thai first, but it was closed). At 9:30pm, the owner asked us to leave. It was not a busy night and we were the only ones left in the restaurant. He had not interest in allowing us to have a slow, fun evening with friends.
Vieng Thai also closes early, but the food is much better than Kon. However, it too is slowly going downhill. Several years ago, you ordered your food without discussing the degree of spiciness. Each dish was spicy and delicious. Now, it is difficult to get a spicy dish at Vieng.
Thai Gourmet is an excellent choice for spicy, delicious Thai food. Asia Market on Cavalcade is my #1 place.