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I think you got a room key if you stayed at the conference hotel(s) and ordered as part of the conference block.

Paris gave them out, at least. The hotel deal was offered on the site, and it was decent. Average $120/night?

Paris, Ballys, Ceasars and I think Flamingo had them, at least.

Yeah, Flamingo had them. Cost $69/night for two beds, so not bad.

I really wanted one, but was one hotel off. Hopefully next time.

I stayed at Bally's. We just got normal Bally's room keys. Maybe we arrived too early (Tuesday)?

The date probably explains it. You could probably just ask for one from the desk on Thursday in the future.

This part of the puzzle implemented one of the badge challenge's secondary goals: getting you to go talk to people.

You had to ask for one, but they were also selling them in packs at the store