The Congress Hotel opened in 1893 and was popular among those who attended the famous 1893 World's Columbian Chicago Exposition.
The Hotel
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The Florentine Room
Connection to Bix: on Nov 25, 1928, the Paul Whiteman Orchestra presented a concert at the Chicago Auditorium. As (I believe) it was customary for Whiteman in his visits to Chicago,, the musicians, including Bix, stayed at the Congress Hotel. That was a few days before his first breakdown in Cleveland, OH.