That's a good suggestion. I never have to wait very long if I'm seated at a table with the drink selection booklet in my hands. On the other hand, I've never waited more then a few minutes standing at a bar before going to another one if they were too busy to serve me.
I've also noticed the servers on all the lines seem to take better care of the people who have more status/rank. Maybe they don't want them complaining. All they have to do is see the color of your card to know how many cruises you have with the line.
Have a great rest of your cruise and don't be afraid to go to another bar for better service or go to the head waiter of a restaurant for something
you're not getting.