I've heard something about a "Golden Ticket" that you can pick up at Coors and can be used at Bent Gate (among other places)...what exactly is the deal with these? 20% off at bent gate sounds like a pretty sweet deal to me!

It looks like it's a city of Golden tourism promotion.
http://www.2hourvacation.com/deals.html

There is a huge list of participating retailers at the site.

From the site
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We've Got Your Trip

There's so much to do: fly fish, take a brewery tour, bike ride, museum-hop or just grab a bite.

Want a chance to win $500 or save up to 20% at participating Golden restaurants and shops? Pick up a Golden Ticket at the Coors Brewery Tour or a Golden event. Then just scratch your ticket in the presence of a Golden merchant and see how much you’ll save or win.