The PS Bancock on Clark St. in Wrigleville, Chicago. It is just a couple of blocks south of the ball park, and has some of the best Thai food in Chicago in my opinion.
We have known the owner for almost 12 years now, she has watched our kids grow up, and is always surprised my kids will try the spicy things when hers won't! They have a great Sunday buffet there, good chance to sample many of their appetizers and most popular dishes. Last we were there (about 6 months ago) it was running about $12.95 per person, but well worth the cost in our opinion. Great service and don't be surprised if you get to meet the owner, she is out on the floor a lot talking to her customers and listening to what they want.