That changes everything. You're actually up by Solvang and the only way you'll be riding in Santa Barbara is if you truck your bikes down there. There are great wineries up around Solvang, take a ride up Foxen Canyon Road to Fess Parker's Winery--great wines, beautiful spot, and a pleasant ride up the hill from Solvang.
There are also plenty of idyllic roads North of Solvang, and a bunch of wine shops and restaurants.
Cold Springs Tavern might be worth a ride, if your friend can stand a little climbing. I remember there was some waterfall spot East of Lake Cachuma, past Paradise Campground--it's kind of a seasonal place that can be too cold or completely dry at the wrong times of the year, but if you get lucky, it's a first-rate skinny-dipping spot.
Have fun and take plenty of pics (not of the skinny-dipping I mean.) Oh yeah, and don't try to schedule too much into one weekend. Where you're going is more suitable for hiking & mtbs than road bikes IMO.