A new smartphone app called LevelUp (which is a cash-free way to pay for things in, like, cash-only situations?) will buy you a taco today at Nick’s Crispy Tacos (Polk and Broadway) if you download the app. Nick’s, you see, is usually cash-only, but this company has persuaded them to start taking such CQ-code payments. They open at 11:30 a.m.! [Grub Street]