The writers' strike may end soon, and the SNL gang may have their day jobs back, but in the meantime, Amy Poehler's getting her groove back. "I went to a hip-hop class at Crunch today," she told us Friday night at actor Justin Theroux's week-long public installation in Soho with a baseball-capped Will Arnett, her actor hubby. "Let me tell you something, those natural endorphins I've heard about -- they really work." Didn't she ever do aerobic activity? "No," she said. "Unless crying is considered an aerobic activity. I gotta get back to work." So what else was she doing with her spare time? "I've doubled my therapy," she said. But didn't less work stress require less therapy? "No," she replied. "I'm a thousand times more stressed when I'm not working. When you can't blame everything on being too busy, a lot of shit comes up."