There’s usually a lot going on at the Oklahoma Jazz Hall of Fame, from interesting history to foot-tapping-inducing live music. You’ll have the opportunity to hear contemporary and classic jazz, as well as occasional other groups playing in genres from blues to folk to big band. Traditional concerts require ticket purchases, but every Tuesday there are two-hour jam sessions that are free to watch. Get there early to explore the surrounding area, which includes a train yard and the Center of the Universe echo circle.