That couple was more understanding than me. They suggested that since a lot of music lovers visit Vienna and that Steinway is (in their words) the most prestigious brand, so many people would come to wait in line to try it out. So it makes sense that the store does not let people play the pianos.
After they left, we lingered around a little more in the store. I started a conversation with the manager, telling him about our New York Steinway. And I talked about our plan to visit the Bösendorfer gallery and factory later. Then he suddenly said, “OK, you can play the piano over there, but only two minutes. Two minutes!”