Ever want to sleep at a museum? Neither did we, until we went to 21c. We recently stayed at the 21c Art Museum Hotel in St.Louis as well as the 21c in Bentonville, Arkansas and had the best time. 21c locations combine actual contemporary art museum gallery exhibitions which are free and open to the general public. Read our hifructos.ecom exclusive interview with 21c's curator Alice Gray Stites by clicking above.