I compiled StepMania from source and did a sudo make install, which made the folder owned by root.
Strangely though, I don't recall needing to run as root even with the sudo make install on Ubuntu, but needed it on Xubuntu. I think it was also fine without root on Kubuntu, but only after changing some GTK theme setting (not entirely sure though).
Owned by root is fine, it's the read/write/execute permissions that matter. Why not just change them?