>> Hometown artist and color field innovator Sam Gilliam’s work is everywhere this month. A sizable inventory of pieces were hung last Friday at the Marsha Mateyka Gallery, and a retrospective is due to open at the Corcoran Gallery of Art this Saturday. >> It’s your last week to catch Jason Zimmerman’s video installation at Transformer Gallery, titled Fair Game. Zimmerman’s looping edit of scenes from the FOX show Cops is one of those cases…