The front of the house at Frasca is like a ballet: a graceful collection of choreographed movements conceived of and directed by co-owner Bobby Stuckey so that every need of every guest is always met. Each employee, from the expediter to the wine director, carries an immense amount of knowledge about the Friulian eatery, articulating answers to questions with authority. And each person knows his or her role, arriving at the exact moment he or she is needed to clear a plate, fill a bread plate or drop off a check — without intruding on a special evening or interrupting the flow of the show. That delicate dance does more than imbue an evening with an air of luxury; it also makes the food taste better.