DON’T try to speak directly to Kevin Spacey. Spies at nightclub Home last Friday night saw the star “standing near a corner booth and dirty dancing by himself.” When a cocktail waitress tried to take his order, Spacey wouldn’t speak to her and instead whispered his orders to a male friend. “He only stopped dancing to order drinks or run frantically through the crowd to the bathroom,” a source told The Post’s Marianne Garvey. Multiple witnesses and a rep for Home confirmed Spacey was at the club.