The seating chart for this event taking place tonight is incorrect: https://www.stubhub.com/american-football-band-chicago-tickets-9-28-2024/event/153243916/?quantity=2
It only has one type of tickets; General Admission.
There are actually two types: General Admission Standing Floor (The floor area), General Admission Seated Balcony (the small upper area on the seating chart.
The event is sold out on the primary ticketing site, so it doesn't show the ticket types: https://www.ticketweb.com/event/sold-out-american-football-thalia-hall-tickets/13621753
But, here is a different event at the same venue that shows the correct sections: https://www.ticketweb.com/event/elephant-revival-with-two-runner-thalia-hall-tickets/13772823