Westin Tabor Center, Denver. Even with a visiting baseball team staying there, and an auto race a few blocks away, we managed to get upgraded to a very nice "junior" suite on the top floor. It was bigger than many two-room suites I've had at other properties, with a spacious bathroom with two sinks, a bidet (!) and both a whirlpool tub and a shower stall.

There were several "named" suites on the floor, but I believe those were Specialty Suites and not available for upgrade; one had a dining/conference table for 10.