Marcus was a founding member of the Finch Mob who in partnership with John Bela of the Rebar art collective and Christopher Guillard of CMG Landscape Architecture, and with a generous grant from the Black Rock Arts Foundation, created a site-specific installation entitled "The Panhandle Bandshell", as part of the ScrapEden SF Program in 2007. In short, it was described as a temporary stage constructed almost entirely out of repurposed materials, designed for community-building and activating a section of the Golden Gate Panhandle.

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The program’s ultimate goal is to change residents’ behaviors around trash in San Francisco. The design was inspired by the iconic form of bandshells that populated small-town parks, civic greens, and large urban venues from the 19th through the 20th century, the most popular of which is LA’s Hollywood Bowl. The goal was to be forthright in the reuse of materials but to play with a vaudevillian, theatrical, almost baroque effect. For instance, the undersides of the car hoods were all painted to give a tin-ceiling effect.

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The novel repurposing of common materials coupled with the bandshell’s success as a sculpture and local event space makes this project a model for collaboration between artists, landscape architects, environmental advocates, and neighborhood residents. A team of several groups and organizations, including CMG, were a part of the bandshell ideation, site selection, community process and design, fabrication, permitting, installation, and programming. The bandshell was programmed via an open online calendar that individuals or groups could book for both impromptu and scheduled performances, which continued for four months over the summer.

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Roof 65 recycled car hoods. Flooring 75 recycled wooden doors. Wall 3,000 recycled water bottles. Fascia Relief 200 pounds of recycled computer circuit boards.