So is there anywhere on campus where I can play/practice piano?
OTHER than the residence buildings, TSH music rooms (I'm not a music student), and MDCL 4th floor.

I played the piano on MDCL 4th floor a handful of times, but was kicked off by a random lady who interrupted in the middle of my playing to yell "can you be quiet! there are students trying to study here"
although there were no students complaining and the piano is for public use?? Sometimes, I even just went there with friends to study while listening to others play it-the music was soothing.
But I will never be going there again!

I'm a bit desperate because I love playing music and I haven't been able to do so freely because my piano is at home in BC! I'm also part of clubs at Mac that involve volunteer piano performances, and I have nowhere to practice!

Psych building room 205A. It's a lounge style room that can be split in half with a soundproof curtain. The only rule is that when you're done you cover the piano again and tuck the bench under the piano. A lady may sometimes come in to move some tables and chairs around for staff meetings I'm not sure if she's a secretary but she's pretty nice. The piano is okay in terms of quality but it's in tune and I guess is better than nothing.