There is at least one very cool cat in Denver? with a very solid reputation. He is near 40? and well known in the colorado rainbow family. His name is allen butcher, and he can be found on the colorado rainbow family website, as well as rainbowrez@yahoogroups. I think he is so famous, if you just searched his name on google he would come up.
Sometimes the Food not Bombs groups can be good and fun people. Here is the latest info for Boulder: http://www.foodnotbombs.net/colorado.html Currently the Albuquerque group not only gives out a lot of free food three times a week, but also goes on hikes, and swing dances, and even went as a group to the natural Jemez hotsprings. The current info for Albuquerque is wrong on the food not Bombs website, so the current info for Boulder may be wrong also. The QuallaDIY house in Boulder sounds intriquing, i would probably check it out just out of curiosity.
You might want to check out the USA forum also...there is a whole subforum for Colorado. Maybe you'll find some cool people from Boulder there too...