All good things must come to an end — bottles of wine, dreamy vacations, Brad and Jen. But as sad as endings may be, they also mean new beginnings. When Big Wig shut its doors, we knew the guys responsible for some of Chicago’s favorite watering holes (Bird’s Nest, Salud, and Cans) wouldn’t leave this town high and dry for long. Four — part dance club, part lounge, and part late-night hot spot — opens this week in the old Wicker Park space on Division. But don’t expect the kitschy hairdryers of Saturday nights past. The brick storefront has been replaced with a sleek frosted-glass façade, giving Four a decidedly nightclubby feel. Amber LED light bulbs hang from the soaring ceiling, steel beams crisscross the room, and there’s plenty of space to sip cocktails at one of the three backlit bars. If you’re more into watching action then making it, climb one of the industrial staircases that flank the dance floor and spy on the revelers below who’ll be going strong until the 4 a.m close. Alas, even fun of this caliber must come to an end. Four, 1551 West Division Street, between Milwaukee and Ashland Avenues (773-235-9100).