Via spanking new neighborhood blog Hayeswire, comes word of a new expanded Off the Grid presence in Hayes Valley at Octavia and Linden. As you know, OTG has been flashing a food truck a night in this space for some time, but now they'll start doing a larger market, similar to the ones in the Upper Haight and Fort Mason. Organizer Matt Cohen confirms it'll go down every Wednesday from 5 to 8 p.m. with live music from 6 to 7:30 p.m. Tonight the rotation will be Hapa SF, KoJa Kitchen and The Taco Guys. Next Wednesday, it'll be The Chairman, Curry Up Now, and Senor Sisig. Cohen says the truck lineup will rotate weekly with these two groups for now, and there are more Hayes Valley market nights in the works.