Towel-Animal, I was also on this cruise (Columbia - Panama Discovery segment). You have done and outstanding job with your well written chronicle. Thank you for taking the time to provide such a detailed report.
I will admit I am probably the only other passenger other than you on this segment who chose to try the indoor pool in the Yacht Club. Initially I thought I would only be in the water for a minute of two . However, I actually enjoyed it and stayed to swim for while. Of course only two bar tenders were around at the time so they were amused. I would l have stayed longer if I had known about the multiple buttons in this pool that turn on localized water jets.
I will withhold my final judgement on this Yacht Club pool until I cruise the Norwegian Fjords in July where it might become a more viable option given the cold weather.
I have attached a photo I took while standing in the pool. It is a nice view.