My birthday parties have always involved a lively mix of great friends and good wine. Problem was, I'd wake the next day feeling not so much a year older as 100 years older. So when I turned 40, I switched things up: Rather than stay out obscenely late, my pals and I met obscenely early to celebrate at a workout party. Turns out, I'm not the first to turn a sweat session into a social affair.
Courtesty of Establishments