Take an old streetcar west, and have an Irish coffee and breakfast at Buena Vista Cafe.
Begin your march towards the Golden Gate bridge and pass along the Marina Green and marina, past St. Francis YC, and across Chrissy Field to Ft. Point.
Return the way you came, or get a lift back to Ghiradelli Square and take a cable car up and away, passing Lombard St. down to Market St. You can catch a historic streetcar back to Fisherman's Wharf. Or take the other cable car line up through North Beach.
Watch Friday evening windsurfing/kiting from St Francis YC bar.
Catch a show at the Mitchell Brothers.
Legion of Honor is a nice museum with a nice restaurant.