I prefer to be seated at a large table for dinner. I feel a bit like a third wheel sitting at a table for 4 when there's just me and a couple. That can be VERY awkward.
What is really awkward is when you're eating alone, and someone (out of the kindness of their hearts) invites you to join them and you politely decline. Sometimes they don't take no for an answer. I was having a burger at Johnny Rocket's on Freedom of the Seas and on the last chapter of a pretty good book when a family sitting next to me invited me to join them. I was pretty much finished with my meal and just finishing the last few pages of my book, so I said "No, but thank you." and then the Dad and I got into an extraordinarily polite battle of wills. He kept insisting and I kept declining and so forth.
Some folks just can't imagine why someone might want to be alone, even for just an instant, rather than join a family they don't know composed of two tired adults and three sugar filled kids.
As to the shows, I attend a lot of theatre in real life solo, (live and film) so I have over the years grown less self-conscious about this. So much so that I often go see something solo even if I know someone has expressed interest in seeing it with me. But sometimes on the cruise, people really want you to join there group, which is usually fine. But occasionally it's a collection of loud drunks who are interrupting the show and you really don't want to be grouped in with them.
I always feel awkward at the pool or hot tub though. Especially if I forget my sunglasses I feel like kind of a creeper just sitting by the pool alone. I become paranoid that people think I'm there to stare at girls in bikini's. Also similar experiences in the hot tub.
And some excursions are a bit rough to do solo, as they are often built with the idea of having someone help you with things and you get kind of "spotlighted" for being alone.
Do folks have similar experiences?