There were some broken hearts in Potomac Village this week when Mix Bar & Grille closed its doors just ahead of Valentine’s Day. The tables were set for dinner and there was no “closed” sign on the door when we stopped by, but the restaurant’s voicemail was full with no sign of activity inside. A sister restaurant in Silver Spring also wasn’t answering the phones this week. If Mix is gone for good, it will be the second eatery to close in the past two months at the Potomac Promenade shopping center on Falls Road. Fortune Garden departed in December, and the search is on for a new tenant. Click here for more.