Free Coffee will greet customers from 7 a.m. to 11 a.m. this Thursday at their local 7-Eleven store. Something’s brewing at 7-Eleven Inc. as its U.S. and Canada stores get ready to celebrate National Coffee Day on Thursday, Sept. 29, with its own caffeinated celebration – CofFREE Day.  From 7 a.m. to 11 a.m. on…