Tickets for the general public to attend Monday's inauguration of Mayor-elect Brandon Johnson, all 50 aldermen and other city executive officers opened Monday morning and were all claimed by Monday evening, the event's ticket website showed. A separate waitlist for additional tickets was also opened. Johnson will be sworn in as Chicago's 57th mayor at 10:30 a.m. Monday at Credit Union 1 Arena at 525 S. Racine Ave.