Take advantage of our 2017 Grad Party Special. Book online using promotion code "2017GRADPARTY" (without quotes) to get $50.00 off The Secret Library or Rock Creek Mercantile when you reserve a full game for up to 8 people. You must enter the promotion code before choosing your booking time. Payment due at time of reservation. Offer valid for any game booking that is created before May 31, 2017. The game's booking date can be after May 31, 2017 as long as the booking was created prior to May 31, 2017. Bookings can be made up to 30 days in advance.