Just had my first denial of multiple rooms getting breakfast amenity at a hotel in Berlin. Not even sure why since the check-in agent confirmed it would count for both rooms. The next morning my friends in the second room were told they had to pay. I took care of that bill with the front desk (they wrote it off) but told me my AMB status would not extend to that room and they would have to pay. No biggie. I know it's going above & beyond if the hotel does allow it.
This is contrasted with literally every other time I've asked (and it usually only happens 1x a year, if that) when they say, "Of course, and thank you for being an AMB member." London and a different hotel in Berlin come to mind.
-RM