Sparkling champagne, savory treats and special perks will flow from four classy new downtown West Chester establishments all Saturday long, and the Greater West Chester Chamber of Commerce invites you to help mark each of their milestones.

In celebration of the newest additions to downtown, The Master’s Baker will cut the ribbon for its grand opening with free cupcakes between 11 a.m. and 1 p.m. at 319 W. Gay St., and Tesoro Leather will host its first open house with discounts, prizes, sweet treats, mimosas and leather handbags from 10 a.m. to 6 p.m. at 21 S. High St. in West Chester.

Meanwhile, La Baguette Magique is baking up quite the first birthday party. Join the eatery between 9 a.m. and 3 p.m. for free rolls, giveaways and surprises, including gift cards, breakfast baskets, free drinks and gifts at 202 W. Market St.

Finally, Tish Boutique is turning 3 — and offering 30 percent off its luxury fashions and accessories, plus cake, champagne and an in-house runway show with professional models sporting the latest styles. Check it out from 11 a.m. to 2 p.m. at 138 E. Gay St.

Together, they make for a can’t-miss West Chester party.