Today I had PT at 2 which gave me a little time to recuperate and get prepare for my Core class at 5:30. It was all good. So I got to the gym at 5, warmed up in the dry sauna, hit the elliptical for 15 minutes to warm up further and then went to class in Studio 1. Much to my chagrin, the class wasn't IN Studio 1. It was in Studio 2, which is just down stairs, however as I've never had a class in Studio 2, I always forget that it's even there. So I assumed the schedule I have at home was wrong and just did my weight lifting workout. About midway through I realized my potential error and then verified it on the way out of the gym. Damnit.
My punishment for being stupid/forgetful: make up class is at 7:00 a.m. tomorrow. Stupid, stupid, stupid.