Each month, artists in the California Building in northeast Minneapolis open their studios up for special sales, receptions, activities, and demonstrations. This weekend, however, they will expand the event with pop-up shopping that goes beyond typical art offerings. Oddities to be discovered include ballet slippers, old frames, art books, antique furniture, and scratch-and-dent art pieces at bargain prices. Check out the fourth-floor lobby, where one artist boasts that you’ll find tropical-themed items, kitschy knick-knacks, and possibly even a signed cookbook by Linda McCartney. For starving artists who need to get creative for cheap, many studios will also be selling things like secondhand art supplies and other related items. Stop by Mojo Coffee Gallery for free caffeinated beverages.