Wasn't aware of that, though it doesn't surprise me - here I go again ;-)
http://www.houston.o...earch/20AW005.pdf
Houston is one of the few U.S. cities (New York City, Chicago, Seattle and San Francisco are others) that offer world-class, year-round resident companies in all of the major performing arts—symphony (Houston Symphony Orchestra), opera (Houston Grand Opera), drama (The Alley Theatre) and ballet (Houston Ballet).
http://www.houstontx...tsandmuseums.html
Located downtown, the 17-block Theater District is home to eight performing arts organizations and more than 12,000 seats. Only New York City has more seats concentrated in one geographic area.