Sitting in our freezing office, I had this exchange with my coworker:
Me: "If you really want to get warm, go use the ladies room on the next floor. It's like 85 degrees in there."
"How do you know that?"
"Sometimes I use that bathroom so that I can run up a flight of stairs to get my heart rate going."
"You need help." With a look of total disbelief on her face.