The yoga class was a mellow hour (what they call core yoga: "taught in a flow style and focuses on using postures to build strength and balance in the back muscles, the abdominals and the glutes", but I am out of practice enough that I felt queasy by the end of the hour. Still, felt good to stretch out all those neglected muscles.
Tomorrow is my fitness assessment (cardio, weights, etc.); the membership comes with that and three follow-up personal trainer sessions, which I'm looking forward to. Right now, I'm all fired up -- we'll see if it lasts.