By Marisa Kendall, The San Jose Mercury News It’s the question no Bay Area local wants to hear when they’re entertaining friends or family from out of town: “Can we go to Fisherman’s Wharf to see the sea lions?” Or even worse — maybe your loved ones suggests a Segway or double-decker bus tour. Nothing sucks the fun out of a Saturday afternoon like fighting through hordes of tourists pointing cameras at enormous, barking marine mammals, lugging armloads of shopping bags and chowing down on clam chowder. But, thanks to a new feature from Airbnb, there’s now an alternative to traditional sight-seeing.