I was a regular Rockstar in April on Scarlet Lady and indeed the room service delivery fee was waived, regardless of whether your order had a charge or not. We ordered a few different times and it was free, aka included in fare 😉 . We tried to tip each time and only once did the person stick around long enough to accept it.
as others have said, first round of mini bar is included. Rockstar agent said they don’t care if you actually drink it, the bottles are yours to take.
Be sure to check your app messages a few times a day. Our rockstar agent invited us to a “top secret” bridge tour which was “limited availability”. This message only came through the app. I have a feeling all rock stars had a chance to go, but still a good idea to check your messages periodically.
other than that, we didn’t get any other perks that aren’t already known about. I’m sure we could have asked for more, but we didn’t need anything else.