If you want to give your credit card some exercise, head out to Sporgasse Shopping Street in Graz City Centre. Splash some more cash at Farmer's Market on Lendplatz and Farmers Market on Kaiser-Josef-Platz.
If you want to see a show while you're in town, try and grab some tickets at Graz Playhouse in Graz City Centre. If you enjoy the show and want to see another, Graz Opera House, Next Liberty, and MUMUTH Theater are all a short walk away.
Diocesan Museum is just one of the attractions in Graz City Centre, Graz so you might want to stop by during your trip. If you want to experience more of the culture Graz has to offer, head to Graz Cathedral, Graz Castle, and Mausoleum of Emperor Ferdinand II..