We will be on Marina next week (Nov. 1). We are in a PH and are traveling with another couple who are in a Concierge cabin. When our date for reserving restaurants came up I was easily able to make our reservations on line and, in each case, add our two friends in as guests even though their reservation window had yet to open. I did this for 8 reservations, 2 per specialty restaurant, even though our friends only had guaranteed slots for 4 nights. This is all pretty self-explanatory in the on-line instructions. A couple things to watch out for, though. First, you apparently can't add more than 2 guests -- the option to add a guest disappears after the second is added. Second, if your trip is a segmented journey, made up of 2 shorter underlying cruises, your reservations must be spread out -- with us, 1 per restaurant in each segment to reach the total of 8.