Dr. Sketchy’s SF - where burlesque meets art school in a bar over drinks
SF Sketchers - they go out every weekend to great spots around SF
Urban Sketchers - Correspondents from all corners of the world with diverse backgrounds. Some are veteran published authors, others are young illustrators. All of them share the same passion for drawing on location.
The Sketchbook Project - A sketchbook museum and travel show. Participate!
SketchCrawl - happens 4 times a year on a specific day all around the world!
SF Art News Blog http://sfartnews.wordpress.com/events/
SF Artist Network http://web.mac.com/stephencwagner/SFArtistNetwork/HOME.html
Iphone Sketchbook Drawings http://iphonesketchbookdrawings.blogspot.com/
Hand Drawn Dispatches http://kylelindholm.blogspot.com/
Bagdad Journal by Steve Mumford http://www.artnet.com/magazine/features/baghdadjournal.asp
James Jean http://www.jamesjean.com/sketch/
Enrique Flores http://www.4ojos.com/sketchbooks.html
Smithsonian Sketchbooks http://www.aaa.si.edu/exhibitions/visual-thinking-sketchbooks
Morning Metro Daily http://www.flickr.com/photos/mfukum/sets/973795
Artists Sketchbooks Online http://www.gis.net/%7Escatt/sketchbook/links2.html
Urban Sketchers Flickr site (they have weekly themes, you can post your drawings) http://www.flickr.com/groups/urbansketches/
Parkour Motion Reel (drawing in action!) http://www.dailymotion.com/video/xbol51_parkour-motion-reel_creation
Subway Life http://www.subway-life.com/
Art on the Underground - Dryden Goodwin http://art.tfl.gov.uk/projects/detail/1632/
Louise Stanley http://lulu.artist-at-large.com/journals/
Dawood Marion http://dawoodsketchs.blogspot.com/
The Sketchbook Project http://www.arthousecoop.com/projects/sketchbookproject/
How to Draw People on the Subway https://www.theawl.com/2014/11/how-to-draw-people-on-the-subway/