You go out with your friends on a Friday night after work for happy hour. One drink becomes two, or maybe even three, and suddenly you find yourself nodding off at the bar while your friends hit the dance floor. You figure you may as well go home and get some shuteye. But a couple hours after you hit the pillow, you’re suddenly wide awake. You can’t sleep after drinking, and you spend the rest of the night tossing and turning in bed, regretting that third glass of wine.