It's late in the evening and inside the Avenue Bar on the sixth deck, Carlos, a young and very talented Argentine guitarist and singer is doing an R&B set with three of the ship's musicians. They rarely perform together but jam as though they do it every night. They are daring enough to take requests from the audience. One man requests "Layla" and Carlos and his three mates perform it brilliantly.

I'm so taken by Carlos' talent that I take a video of the performance hoping to show it Mike, Bonnie's son, who is a wonderful amateur musician.

At about the same time, Mike is on a porch in Atlanta, Ga. His small band is performing in Porch Fest, an annual neighborhood event in which musical groups of many types perform on the front porches of homes in his area. In the roaming audience is Bonnie, Jeff (Mike's father), Kat (Mike's wife) and Sage (Mike's newborn daughter).

When Carlos finishes his set in the Avenue, I rush to a quiet area on the ship and call Bonnie on WhatsApp anxious to relate my daily adventures.

I tell her about Carlos and how I videoed Carlos playing "Layla" to show Mike.

"You're kidding me," Bonnie exclaimed. "What song did you tape?"

"Layla," I repeated.

"Mike just played that too," Bonnie said.

I'm not positive why we both got so excited about this little coincidence, but we did.