Link:
Colorado Department of Revenue
The last couple of paragraphs explain that "social gambling" is allowed as long as there is a bona fide social relationship based on something other than gambling. I would argue that if you have ever talked to your poker buddies about anything other than gambling, you are in under this exception.
Here's a nifty case that says that "the critical inquiry is whether the participants here came together for any shared purpose other than gambling."
FindLaw for Legal Professionals - Case Law, Federal and State Resources, Forms, and Code (Oops. Looks like you need to sign in for that case. Anyway, it's
Leichliter v. State Liquor Licensing Authority.) Short version: guys were at a bar and ran a basketball pool. Court held they were there to socialize as well as gamble, so no violation. So again, I argue if you have any other conceivable social purpose, even as generic as hanging out, talking, socializing, they won't bust you.
Also from that case is this quote: "In
Houston v. Younghans, 196 Colo. 53, 580 P.2d 801 (1978 ), however, the court determined that poker playing for money among friends at the home of one of the players was incidental to a
bona fide social relationship."
That should seal it as far as friendly home games.