If you're in San Francisco's Potrero District on weekdays, you can spend a happy half-hour sampling Gallery 16's show of informal communications on paper. It's a gathering of Post-It notes, sketches, postcards, notebook pages, lost-pet signs, and so on. Here are a couple of grids from the show:
Below, on a shelf, is a message missile from a prison in Russia, found by Nigel Poor. The tip of the missile is made of bread.
Here's a detail from a large drawing by Lauren Davies, prompted by the irritations of art fair participation:
The show runs through May 12th. The gallery is open Monday through Friday, 9:00 am to 5:00 pm. The address is 1616 Sixteenth St. (third floor).