Not a Marriott wide rule TTBOMK. The reason I say that is have received letters at RCC and Sydney Harbour Marriott, both of which said I was allowed one guest.

Lounge tangent: The Sydney Harbour Marriott letter also said all food and drink were to be consumed in the lounge. They did object when I attempted to take a bottle of water (just one) back to my room and would not allow it. The same letter said children were not allowed in the lounge after 5, but when asked why they were selectively enforcing their rules they could not provide a valid reason why they allowed children in the lounge. And the lounge was packed every evening, and since I don't drink alcohol and travel alone, those were two reasons why I wanted to take the water back to my room. FWIW, they did allow many people to take coffee out of the lounge. I don't understand the difference. My solution about the water was to drink what I wanted and then they could throw away what I didn't want at the time. I ended up using more bottles of water than I would have if they had allowed me to take it back to my room. I kind of annoyed me, but didn't ruin my trip as you can tell since this stay was back in December and if it had, I would have posted about it previously.