As for airports with "hot boxes", as I call them (I guess it has a slightly different connotation, but oh well), STL has to win the prize. I haven't been there in about a year (switched from TW to UA!), but it seemed like they kept shrinking the smoking lounges until they ended up being about 8' x 10' glass rooms that were amazingly putrid with smoke. The worst part was that they had regular doors on them and when it was REALLY crowded, people would hold the door open. You had to hold your breath as you walked down the absurdly long concourse in front of it.