295 Fell St San Francisco, CA 94102, USA
Signs glued, so as to be unremovable, to a dozen corner and mid-block lamp posts, littering Hayes Valley/ Van Ness neighborhood. See photograph for sample.
Signs advertise a music event operated by a "free" radio station, and websites request $ donation: http://www.radiovalencia.fm/about/
See the Twitter site for a copy of the glued sign: https://twitter.com/RadioValenciaSF?s=09
Phone number is included on the website for the entity that posted these advertisements to the light posts: (415) 962-7979
I tried removing multiple signs and I'm only able to remove a thumbnail sized chunk of the sign, because of the amount of glue they use. This is going to be difficult for the city workers to remove.