Has Bruce Willis left behind beer and barstools for wine and a more posh drinking atmosphere? The NY Post is saying yes. Willis has reportedly become a partner with the Bowery Wine Co., where he was spotted bartending at his private party last week. The watering hole (which is "upscale and loungy") is set to open its doors to the public this weekend, and is located at 13 East 1st Street (housed within Avalon Bowery......