This is a great photo opportunity. I've scheduled the meetup for early in the day - hopefully before the crowds descend!
There is no formal teaching or 'route' for this meetup - show up and enjoy! I'll be there early, but you can take advantage of this opportunity anytime over the weekend. It's a great people-watching opportunity. Bring water - it's usually hot and the sun is brutal on the asphalt/concrete!
The Chalk Art Festival officially runs Saturday, June 1 from 10 am - 10 pm, and Sunday June 2 from 10 am - 7 pm. Feel free to attend at any time and share some images with the group!
More information here: http://www.denver.org/events/detail?e=3892&t=annual-event
Rendezvous point is the Starbucks on the corner of Lawrence and 16th Street Mall, 9 am. Though parking is free on Sundays, it may be a challenge with the Chalk Art Festival.