public static void ReleaseTakenSeat(int showId, int seatId, string userId)
	    {
		    var username = ChatUserManager.GetName(showId, userId);
			if (takenSeats.ContainsKey(showId) && takenSeats[showId].ContainsKey(username) &&
		        takenSeats[showId][username].Contains(seatId))
		    {
			    takenSeats[showId][username].Remove(seatId);
		    }
		}
	    public static List<int> ReleaseTakenSeats(int showId, string userId)
	    {
		    List<int> takenSeatsList = null;
		    var username = ChatUserManager.GetName(showId, userId);
		    if (takenSeats.ContainsKey(showId) && takenSeats[showId].ContainsKey(username))
		    {
			    takenSeatsList = new List<int>(takenSeats[showId][username]);
				takenSeats[showId][username].Clear();
		    }

		    return takenSeatsList;
	    }