Some Marriott hotels consist almost entirely of identical "cookie cutter" rooms. The Des Moines Downtown Marriott comes to mind. Apparently, when it was built in the 1980s, the idea was to give every guest the same experience.

With the exception of one or two hospitality suites, every room at the Des Moines Downtown Marriott is the same. Even the corner rooms don't have side windows. The room on the concierge floors have the same square footage, furnishings, and amenities as the regular rooms. The Concierge Lounge is down on the mezzanine level.

It makes a meaningful Gold, Platinum, or PP upgrade pretty much impossible.