When’s the last time you got something in Highland Park for free? Besides a traffic ticket? (Oh, wait, you had to pay for that.) Well, tonight’s your chance: the Shop-N-Hop event kicks off at Snider Plaza tonight, with cocktails and hors d’oeuvres provided by the host stores and discounts up to 25 percent. Stop in At My Table for cute patterned plates or table accessories, fun vintage-y stuff at Uptown Country Home, or darling linens for the nursery at Baby Bliss. And, lest your neglected wardrobe develop trendy envy, Blues Jean Bar and Melanie Gayle are participating, too. Just don’t let the cocktails persuade you that you’ll find lots of places to wear those five-inch heels. Shop tonight, May 31, from 5 to 7 p.m. at Snider Plaza.