Here's a possible location for a sketch-out - Broadway Village.

Here are a couple of links to sites with a photo: http://www.broadwayvillagetucson.com/
http://www.visittucson.org/includes/calendar-of-events/Broadway-Village-Farmers-Market/1600/
There's a Farmer's Market every Friday, 10-2. Center is historic, has been updated, looks very picturesque. We need a date, and I'll try to go & explore the area to see where we might meet, etc.