Craft Alliance Center of Art + Design (https://craftalliance.org/) - a non-profit art center offering contemporary craft exhibitions, classes, free community programs, and a gallery shop featuring the work of national and regional artists.
Blueberry Hill (http://blueberryhill.com/) - Longtime pop culture–themed diner with late hours offering American fare & frequent live music.
Pin-Up Bowl (http://www.pinupbowl.com/) - Small bowling alley with 8 lanes, plus a retro-style lounge with a full bar, snacks & sandwiches.
Saint Louis Art Museum (http://www.slam.org/) - a wonderful art museum with excellent collections of classic and modern art, sculpture, photography, and more. Free.
Center of Contemporary Arts (http://www.cocastl.org/) - nationally recognized not-for-profit arts organization whose innovative programs encourage people to see, think and express themselves in new ways.
Forest Park (https://www.forestparkforever.org/) - famous for hosting the 1904 World's Fair. It still contains a few buildings from that time plus many other city attractions. Most of the things in Forest Park are free to the public and supported by taxes from city and county.
Missouri History Museum (http://www.mohistory.org/) - both permanent and rotating exhibitions about St. Louis, Lewis & Clark, Charles Lindbergh, and more. Free.
Missouri Botanical Garden (http://www.missouribotanicalgarden.org/) - one of the finest public gardens in the world, a great place to wander and relax. Kids can also enjoy their enormous outside kids area.
Mildred Lane Kemper Art Museum (http://www.kemperartmuseum.wustl.edu/) - It is the oldest art museum west of the Mississippi River with a collection formed in large part by acquiring significant works by artists of the time, a legacy that continues today. The Museum contains strong holdings of 19th-, 20th-, and 21st-century European and American paintings, sculptures, prints, installations, and photographs.
City Museum (http://www.citymuseum.org/) - a few blocks north of the hotel is the City Museum, which was created by a St. Louis artist. It's an old factory rehabbed into a museum and has a crazy tunnel system kids love (and parents fear) a St. Louis architecture exhibit, and many other weird, beautiful, and interesting things. Truly unique and a favorite for kids.
St. Louis Zoo (https://www.stlzoo.org/) - one of the best zoos in the country and the first zoo to pioneer open-air enclosures. Contains one of the largest flight cages in the world dating back to the 1904 world's fair. Free.
St. Louis Science Center (http://www.slsc.org/) - St. Louis science center and planetarium connect with a bridge over I-64. The Planetarium features exhibits about aviation and space while the science center holds exhibits about dinosaurs, the senses, Omnimax, etc. Free general admission.