"Siemens codes (SIE / 7346) are among the most reliably active corporate codes, showing 15–22% discounts at many global Marriott properties. The code appears in widely distributed PDF documents traceable to 2014. If you are caught, the property can raise your rate to the current rack rate and you could be considered to be defrauding the property. Wide documentation suggests this code has been in circulation for over 10 years."

"I now always make it a matter of course to carry documents (business cards of my contacts, e-mails requesting my visit etc.) from my host company when I travel. This has always proven sufficient for the few times I've been challenged by the front desk clerk."

"I wanted a higher room floor at a Seattle area hotel. I requested it at the front desk when checking in. The front desk thanked me for being a platinum member and told me that the hotel is fully booked and no “upgrades” to a higher floor for me. The girl behind me checked in and she was thanked for being gold, and they gave her a free upgrade to a suite and let her choose which room she wanted! I asked about the upgrade and they told me it’s random. I spoke to the manager and the manager said lots of rooms available and she gave me 5 rooms to choose from. 🤷🏻‍♂️ In the end, I got my upgrade. Had to fight for it."