Does this violate section 1 of the Sherman Act? Explain.?

[taryn31]

In March 2004, a class action suit was filed in Madison, Wisconsin, that accused 24 bars and the Madison-Dane County Tavern League of conspiring to fix prices on beer and liquor by agreeing to eliminate weekend happy hours. The suit, filed on behalf of three University of Wisconsin students, contends that the university of Wisconsin encouraged bars to allude as part of an anti-drinking campaign. There is no evidence that the bar owners ever directly communicated.

Based on THIS INFORMATIOM, do you think this is a violation of section 1 of the Sherman Act?