I too have knit in Denver. It's a Knitter Friendly place.
The airport is a lovely spot and you can count on making a couple new friends the minute the needles come out.
The wait staff at the Hard Rock Cafe are yarn-tolerant too.
Enjoy your stay a mile up!
Should you get a chance to wander up into Boulder during daylight hours, visit http://www.shuttlesspindlesandskeins.com/
at the Table Mesa Shopping Center. Instant yarn-nirvana at the insane amount of yarn in that store. It's pure bliss.
I am chillawilla on Ravelry.
OTN(s): Nutkin socks, cabled scarf
FO: Sprout Cardi
In progress on the wheel: fingering 2-ply for the cabled scarf
On the spindle: worsted 2-ply handdyed BFL yum