What changes in Chicago?
United Center turns between 20,917 for basketball, 19,717 for hockey, and 23,500 for concerts, so usher and gate crews book against fast credentialed changeovers.
Source: en.wikipedia.org
Ushers & Guest Services in Chicago
Local field decisions
What should the Chicago usher and guest-services crew brief cover at United Center, Near West Side?
Confirm the United Center configuration before sizing or posting the usher team. Basketball capacity reaches 20,917; hockey uses 19,717; concerts can rise to 23,500, so the same concourse does not produce the same guest flow every night.
Source: en.wikipedia.org
What goes on the Chicago call sheet?
The brief should show active entrances, seating sections, closed or reconfigured areas, credential boundaries, accessible routes, supervisor zones, and the post-event release sequence. A Bulls date may be followed by Blackhawks or concert use, making credential and post-map updates essential between shows. Use the event's approved layout, not the previous night's roster, to assign gates and guest-services coverage.
Source: en.wikipedia.org