I'm not going on this cruise but I just got back from the 35th anniversary cruise Feb 2. Oh my God, Solo is awesome on Olivia. I'm sure being a couple is great too but that wasn't what was up for me this time out.:) Wish me luck for next time oh oh I'm supposed to be answering your question..
I don't know about how they book roomates because I was sort of last minute and got a two for one and didn't have to have a roomate for that price and didn't have to pay extra to be in my room alone. I would call the Olivia office and get the person who booked you to tell you if you have to pay extra to be alone. Let them know stuff like non smoker, snorer, up late anything you think is important. If your a non drinker you may not want someone who rolls in at 3 am loud and smashed....now if your the smashed one that may be different!!
I would recommend Solo to anyone. They really go a long way to make you feel really comfortable and cared for. It's great to eat together (special area in the dining rooms) and get to know new people. Your friends-if they are a couple- don't have to worry about you not having fun or being lonely. You can spend as much time or as little time seeing your friends because there is so much to do on the solo's program. Even the "sista's" at sea program is open to all colors and hues, no exclusionary stuff and they have activities too. They have some excursions just for solos. I took one and passed on another because it seemed like too much climbing around to get to the beach. "Virgin Gorda" . The solo program is not a fix up program but people do meet people. There was so much fun stuff to do I can't even remember. Best of luck you'll have a blast. They put the next days schedule in the door the night before and you can check out the Solo stuff. They gave us a little tag you can choose or not to choose to wear. It sounds kind of silly ... a dog tag with olivia on it...It was the hottest item on the ship everyone asked me how they could get one. Who knew? I really liked wearing mine it was fun.
Feel free to ask more questions if you like. I was telling someone else about the solo program and said that I usually don't email much but I love telling anyone how great Olivia was. Chai