This happened to me earlier this year. Came back to the hotel from a walk to find the whole block was out. I could have gone upstairs 12 floors if I really wanted to, but I came back for a rest not a workout. I couldnt fault the staff at all because they went upstairs with flashlights to assist guests who were leaving. I ended up hanging out in the lobby for about 2 hrs until the power came back and the lifts were reset.