This Wednesday, Allegro Apartments in Columbia Heights will have its grand opening...with a twist. To promote the new development, Allegro ran a contest where it asked the general public to submit recipes for a signature cocktail called the Velvet Allegro. On Wednesday night as people tour the apartments, the top three submissions will go up against three from bartenders at participating restaurants and the winning cocktail will be featured at DC-area restaurants and bars for the next month. More after the jump.