With Valentine’s Day looming, reservations are growing tight. So here’s an idea for the budget-minded: Forget about booking a table and treat your sweetie to frozen yogurt (a holiday-appropriate red velvet cake, among other flavors) at Chilly Billy’s Frozen Yogurt (314 15th Av. SE., Mpls., 612-843-4278, www.chillybillysfrozenyogurt.com), which is offering a buy-one-get-one-at-half-price sale all day on Thursday.