Cousins Mahmoud Qishit and Adam Alnouri are not typical 21- and 19-year-olds. Instead of splitting their time between studying in the library and partying, they just opened their new bubble tea store, Teabar Boba, in downtown Evanston. “We’re trying to bring something new here,” Alnouri said. “We’re not franchised. We’re family-owned — we’re not like...