I eat at 'Ohana SOLO on every trip and don't feel out of place!
'Ohana is actually a beautiful place for a romantic couple's dinner. Just ask for a table in the corner, away from the center area.
But be warned - 'Ohana now has no tables for two. They have tables for 3, which are actually tables for 4 that have been pushed up against the wall; I waited 90 minutes last December, with a reservation, while families of 4 or more who showed up after me were being seated in 20 minutes or less. Needless to say, I complained.
But even with that trouble, I still had a wonderful meal and highly recommend 'Ohana to anyone, singles, couples, groups, or families.