Related Links Tony Gemignani's Slice House opening outpost in The Market on Market Sweetgreen debuts in ex-Oscar's space in Berkeley When Jim Telford opened Residual Sugar Wine Bar it was very much under the radar, located on a then-low trafficked block on the outskirts of downtown Walnut Creek. The circumstances surrounding his second project couldn’t be more different, as he is set to open a restaurant and bar in what just might be the most high-profile spot in Contra Costa County, occupying the rooftop space above the just opened Teleferic tapas bar in a splashy new development in the heart of downtown. “Residual Sugar definitely had an incognito, off the