Taco Day at Mercadito; Free Wendy's Burgers; More

RIVER NORTH—In honor of National Taco Day today, Mercadito is offering two tacos (from the list of 11) for $5.50 from 5 p.m. until the restaurant closes. [EaterWire]

MILLENNIUM PARK—Tavern on the Park announced Mike Clark, an 18-year veteran of the Gibson's Group, as the restaurant's new executive chef. [EaterWire]

EVANSTON—On Oct. 5 between 11 a.m. and 5 p.m., Wendy's will hand out free Hot N' Juicy burgers with a frosty (while supplies last) in the East SPAC lot at Northwestern University. Wendy Thomas, daughter of founder Dave Thomas, will be on hand between 12:30 and 2. [EaterWire]

RIVER NORTH—Joe's Stone Crab is extending its service by one hour each night and anyone who hits the restaurant after 10 p.m. Monday through Friday and tweets @JoesChicago can get half-priced apps throughout October. [EaterWire]

ONLINE—If you missed Ferran Adria's talk at Harold Washing Library last week, it's currently up online, in five parts. [Eatology]