Olivia always has Solo programmes on their trips. They reserve sections in dining rooms for them &, if excursions are involved, have Solos going together. I don't think you would ever feel alone on any Olivia trip. That is unless you wanted to.
I do agree that meeting people ahead of time on this kind of Forum helps a lot.
Of course, all of we couples are very friendly too. That's the great thing about Olivia, everyone is friendly. You will have the time of your life.