Originally Posted by
BrassMonkehy
What happens when I book a local room to meet a challenge or something, check in. And walk out the front door? Do I get the points and stay credit?
The above is completely different than what the OP did. What you type above, you should get points and night/stay credit.
Having said that, you COULD NOT on the same day go to another hotel,in the same city and check in. As you cannot physically sleep in two hotels in one night. The only exception I can think of is a time zone change situation.
You should check out the everything you want to know about the SPG program thread.