Agree. ANY additional is greatly appreciated.
Having said that, the currency of HAL on board is US dollars. Doesn't mean they don't appreciate anything else...
This thread is about the N. Amsterdam, and was active 3 years ago. Not the N Statendam, which wasn't even launched when the N. Amsterdam had this problem. There is absolutely no relationship, that I can see.
You can check the price using the Uber estimator on their website. Surge prices are always possible. The cheapest place to get Uber/Lyft is the center parking area, where there is a ride share pick up area. Check the SFO website for maps and directions.
Gym doesn't have showers. The showers in the pool area are for rinsing off after swim or hot tub.
Only other possibilities would be in the spa area, which I think would be for the spa customers.
Transfers aren't on a fixed schedule, such as a bus leaves every XX minutes or similar. The buses line up, waiting for the ship to clear and start off loading, and leave when full.