Two University of Wisconsin students have brought an anti-trust lawsuit against 24 Madison bars that, according to the lawsuit, all agreed to end Friday and Saturday night drink specials. The bars’ owners said they agreed to ban drink specials under the influence of the university’s chancellor and the PACE Project, which aims to cut back on binge drinking. If the allegations are proven true, the bars could be in violation of federal laws that prohibit business competitors from setting pricing as a group.