I was at a hotel recently when the fire alarm went off at 4am (not a Marriott). Called the front desk & they said it was legit (not necessarily meaning a fire, but yup get out of the room). Trooped down 6 flights of stairs & outside next to fire trucks. 30 minutes later all clear & back to room to try & get some sleep. I put it in the 'stuff happens' category (and glad it wasn't a real fire). Didn't even think about compensation.
A few observations:
* It's really interesting to see what people will put on in the middle of the night when they evacuate a hotel

In my case, a pair of sweats, running shoes, wallet & room key.
* Next time I'd probably grab my laptop & bring it w/ since it's my main computer & I need the info on it.
* Is it a general rule that firemen are hawt?!
Cheers.