Reader architecture contributor Lynn Becker is giving three free talks on his Boom Towns! exhibit at the Chicago Architecture Foundation (224 S. Michigan). The first one's today from 5:30 PM to 6 PM; the others are scheduled for Saturday, October 18, from 11 AM to 11:30 AM and Friday, November 7, from 12:30 PM to 1 PM. All take place at the foundation's ArcelorMittal CitySpace Gallery. The exhibit, which is free, runs through November 21. Call 312-922-3432 for more.