It’s a lot easier to get a hotel-room upgrade than an airline-seat upgrade. This blog post tells you how.
Hotel desk clerks have a lot of leeway. If you irritate them, you may get a room with a clear close-up view of the dumpster that is emptied every morning at 5 A.M.
On the other hand, politeness and the methods in the blog post can get you a nice suite on the executive floor.
You will definitely want to read to the end of the post, which tells what some cash at check-in can do in Las Vegas (and other large cities).