Finally finally finally… the forecast looks great for a weekend full of outdoor summer fun – and Alki Art Fair (co-sponsored by WSB this year for the first time!) is a big part of it, on the beach, both days. Besides the 29 musical acts (here’s our preview, with the schedule) and artists/vendors, a highlight this year is the Alki Bathhouse Centennial Celebration – with vintage swimsuits (like the ones worn by Gaea Singer and Log House Museum manager Sarah Frederick, at right) on display Saturday afternoon – volunteers wearing suits from the Seattle Goodwill Vintage Fashion Collection will parade along the Alki promenade 1-4 pm tomorrow, with a fashion show on the main music stage at 2:30 pm. The Art Fair itself starts at 10 am both days this weekend – around the bathhouse and down the promenade – inside the bathhouse, you’ll find a silent auction, 11 am-4 pm both days – and remember, kids get to help paint a mural!