Schlotzsky’s is offering free Wi-Fi access at two stores on a trial basis. Schlotzsky’s is promoting the trial by Warchalking. In addition to warchalking the sidewalk in front of the stores, the company plans to fly a banner with an open node symbol on it over a University of Texas football game this weekend. In the fourth quarter the banner will change to “Schlotzsky’s Deli — Free Wi-Fi.”