One of the nicer things going on in the center of downtown right now is the conversion of the venerable downtown Colcord Building (1910) into an upscale boutique hotel. The Colcord sits on the NW corner of Robinson & Sheridan, diagonally across the street from the Cox Convention Center.
Coury Properties, Tulsa, is the developer, and it did a marvelous job with an earlier, similar, project in Tulsa with the old Ambassador House hotel, very nice.
From
http://www.couryprop.com/otherProp_colcordHotel.htm
Here's a vintage pic of the same building, from the "Vintage" area of my downtown Okc pages at
http://www.dougloudenback.com/downtown/vintage/1910.htm where other links about the Colcord can be found.