Normal
I'm not suggesting you should have done this but anyone who wished, could always stop by Pinnacle the next day when they had some cash with them to tip the stewards who served them......Not like it was a restaurant many miles away etc We have seen people do this. Having been on the ship a number of days and having signed bar slips they were aware there is no place to write in a tip but had forgotten to bring cash with them to Pinnacle. They easily 'rectified' their discomfort.