Claus Meyer’s pop-up bakery in Williamsburg, Meyers Bageri, is one of the top places in New York to eat bread right now — but no store-bought loaf can top fresh homemade bread, of course. To help customers hone their skills, Meyers Bageri will give out free sourdough-bread starters every Saturday, beginning this weekend, on March 19. Further, the team says it’s totally cool if customers bring in their own starters and ask for advice. (Does this smell funky?) Before you know it, you’ll be running a pop-up bakery out of your own kitchen.