AC Hotel Chicago Downtown — Event Spaces, Floor Plans & Capacities

630 N Rush St, Chicago, IL 60611

5 rooms · largest space: Millennium Park, 1,600 sq ft149 m²

AC Hotel Chicago Downtown gives Chicago event planners 5 rooms to work with. The largest space is Millennium Park, 1,600 sq ft149 m². It holds up to 80 guests. Review the layouts and seating capacities below, then test your setup in 3D — free.

Plan an event in Millennium Park: open a free to-scale layout seating 60 at round tables in its 32 × 50 ft footprint at floors.live/start — no account needed.

Across its 5 rooms, AC Hotel Chicago Downtown handles theater-style sessions for up to 80, seated banquets for 70 and standing receptions for 80. 3 smaller rooms suit breakouts and board meetings. Exact figures for every room and setup style are in the chart below.

Plan your event in this space — free

Unverified listing — compiled from AC Hotel Chicago Downtown’s published information. Venue staff can verify capacities and setups free: floors.live/venues/us/illinois/chicago/ac-hotel-chicago-downtown/?claim=1.

Floor plans

Detailed floor plans for AC Hotel Chicago Downtown are published on the venue’s official site.

View official floor plans at Marriott ↗Plan your event in this space — free

Work at AC Hotel Chicago Downtown? to publish your official floor plans and 360° tours here — free.

Room capacities & dimensions

5 rooms

Room capacities and dimensions for AC Hotel Chicago Downtown
Space	Sq ft / m²	Ceiling	Banquet	Theater	Classroom	Reception	Conference	U-Shape
AC BoardroomPlan this room →	319 sq ft30 m²	8 ft2.4 m	—	—	—	—	10	—
Grant ParkPlan this room →	425 sq ft39 m²	8 ft2.4 m	—	24	18	—	18	15
Lincoln ParkPlan this room →	425 sq ft39 m²	8 ft2.4 m	—	24	18	—	15	15
Millennium ParkPlan this room →	1,600 sq ft149 m²	9 ft2.7 m	70	80	60	80	30	24
Outdoor TerracePlan this room →	1,698 sq ft158 m²	—	—	—	—	65	—	—

Figures from published venue data; blank cells mean the venue hasn’t published that number. Verify final counts with the venue.

Sizing another room? Try the event room capacity calculator or the floor plan scale converter, or compare the largest event spaces in Chicago.

Frequently asked questions

What is the floor plan of AC Hotel Chicago Downtown?

AC Hotel Chicago Downtown has 5 rooms. The largest space is Millennium Park, 1,600 sq ft (32 × 50 ft). Every room's dimensions and seating capacity by setup are listed on this page. AC Hotel Chicago Downtown's own floor plans are published on its website, linked from this page.

How many event rooms does AC Hotel Chicago Downtown have?

AC Hotel Chicago Downtown has 5 rooms.

What is the largest space at AC Hotel Chicago Downtown?

Millennium Park, 1,600 sq ft: 32 × 50 ft, 70 banquet / 80 theater.

How many people can AC Hotel Chicago Downtown seat for a banquet?

Up to 70 in Millennium Park.

What is the ceiling height at AC Hotel Chicago Downtown?

The highest ceiling is 9 ft, in Millennium Park.

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