On May 11, 2009, the City of San Marcos, Texas adopted an ordinance that allowed local bars to extend their hours of operation from midnight until 2 a.m. The objective of this initiative, which went into effect on June 4, 2009, was to minimize the problems that arise from the consumption of alcohol. The present investigation uses interrupted time series autoregressive integrated moving average [ARIMA]) modeling techniques to analyze weekly data to assess the impact of the ordinance, along with a limited increase in patrol strength in the downtown district, on the number of calls for service involving verbal disturbances, physical disturbances, public intoxication, and driving under the influence of alcohol. Overall, the interrupted time series analyses indicate that neither the city council’s nor the police department’s strategies for mitigating some of the negative consequences of the consumption of alcoholic beverages in bars and taverns were successful. The implications of these findings for lessening alcohol-related conflicts between bar patrons and other residents of the community are discussed.