there should be a phone number somewhere to their box office
How can I purchase tickets for Thalia Hall?
Advance tickets can be purchased through www.ticketweb.com or by phone at (866) 777-8932. You can buy physical tickets at our Box Office, open Saturdays at Dusek’s from 12pm-5pm or at Thalia Hall any night we have a show. We accept CASH, VISA, Master Card, American Express, and Discover.
Thalia Hall directly (312) 526-3851
keep trying on ticketweb, every 2 mintues the server works, site stops freezing and you still see tickets available.