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Historic Walnut Ballroom at The Allegro Royal Sonesta Hotel Chicago Loop

Published dimensions

Historic Walnut Ballroom is 25.9 x 12.2 m (85 x 40 ft), 316 m² (3,401 sq ft), with a 4.6 m (15 ft) ceiling.

Plan view

LED wall that fits

Under a 4.6 m ceiling with 1.5 m trim and 0.3 m clearance you get 5 rows of 500 mm tile flown. Along the 25.9 m wall a Absen PL2.5 Plus V2 wall runs 41 x 5 (8200 x 1000 px, 1,599 kg, 32.8 kW).

Panel	Pitch	Wall (cols x rows)	Size	Resolution	Weight	Power (max)
Absen KLCOB 0.78	0.78 mm	34 x 8 = 272	20.4 x 2.7 m	26112 x 3456	1,224 kg / 2,698 lb	24.1 kW, 116 A @ 208 V
Absen PL2.5 Plus V2	2.5 mm	41 x 5 = 205	20.5 x 2.5 m	8200 x 1000	1,599 kg / 3,525 lb	32.8 kW, 158 A @ 208 V
Absen PL3.9 Plus V2	3.9 mm	41 x 5 = 205	20.5 x 2.5 m	5248 x 640	1,599 kg / 3,525 lb	28.7 kW, 138 A @ 208 V

Wall sizing assumes 1.5 m trim to the bottom edge, 0.3 m clearance under the ceiling, and a wall no wider than 80% of the longest wall. Weight and power are tile totals from the panel spec sheet; add processing, rigging, and cable.

Seating estimate

After a 12 x 7 m stage, Historic Walnut Ballroom holds about 515 theater seats, 210 banquet seats at rounds of 10, or 145 classroom seats. Back row in theater is roughly 18.9 m from the downstage edge; the previz checks whether the bottom of the wall clears the heads in front.

Other rooms at The Allegro Royal Sonesta Hotel Chicago Loop

Imperial37.8 x 10.4 m (124 x 34 ft) · 2.7 m ceiling
Imperial I21.9 x 10.4 m (72 x 34 ft) · 2.7 m ceiling
Savoy21.3 x 7.9 m (70 x 26 ft) · 2.7 m ceiling
Orpheum20.1 x 6.4 m (66 x 21 ft) · 2.7 m ceiling
Palladium13.4 x 8.8 m (44 x 29 ft) · 2.7 m ceiling
Walnut Gallery13.7 x 7.9 m (45 x 26 ft) · 4.6 m ceiling
Imperial II15.8 x 5.8 m (52 x 19 ft) · 2.7 m ceiling
Starlet Suite5.8 x 15.2 m (19 x 50 ft) · 2.7 m ceiling
Orpheum I13.4 x 6.4 m (44 x 21 ft) · 2.7 m ceiling
Rialto13.4 x 6.4 m (44 x 21 ft) · 2.7 m ceiling
Aragon6.7 x 6.4 m (22 x 21 ft) · 2.7 m ceiling
Orpheum II6.7 x 6.4 m (22 x 21 ft) · 2.7 m ceiling

Published dimensions (source), fetched 2026-09-05. All rooms at The Allegro Royal Sonesta Hotel Chicago Loop · Venues in Chicago