Denver Post

Tickle your fancy.

Democrats, Republicans, scrapbooking, stay at home moms, Denver Entrepreneurs, foreign languages of all types, vegetarians, motherless daughters, ferret lovers, witches, podcasters, writers, crocheters, artist trading cards, Kabbalah, jazz, ESL, Denver/Boulder paralegals, Architecture for Humanites, pagans, ADD, web comics, cartoonists, boardgames, smokers, ex-Jahova's Witnesses, Sci-Fi fantasy readers, Wal-mart reformers, screenwriters, expat Brazillians, musicians, readers of Socrates, spicy food lovers, anime, women who love wine, Arabic language, drum circles, real estate buying & investing, stitchery, poker, figure drawing, personal growth, 303 Disciples of the Dark, atheists, hip hop, and sports biking.

...you mean you haven't found a MeetUp group yet?

What: MeetUp.com group gatherings
More info: http://www.meetup.com/

Link