As far as I know (and I'm one of the leaders of the Denver Creative Cloud group), Adobe isn't approving any new user groups at this time. This doesn't mean you can't start one, though.
We use Meetup to manage the group (Sam Mestas: Advanced Photoshop Techniques - Denver Adobe Creative Cloud User Group (Denver, CO) - Meetup) but because there is a fee associated with Meetup, other groups use Facebook. You will need to locate a venue, speakers, decide if you want to charge or admission or not, and then announce the group and start recruiting members. Some groups are large, others are quite small. Some meet monthly, others with less frequency. Some are in person, some online, and some are both. All are wonderful opportunities to network with others in your Adobe community and to continue learning about the various Adobe applications. I wish you the best! 