FlyerTalk Forums - View Single Post - How to Check if ROOM is Available for Upgrade When Checking In
Old Aug 1, 2019 | 5:00 pm
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EuropeanPete
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It’s impossible to do accurately unless you’re looking over the shoulder of the receptionist.

One can reach some conclusions from the Marriott website though - for example if they’re selling no suites and only one type of room out of 11 they’re probably pretty full.
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