["Criminology &Public Policy, EarlyView. ", "\nAbstract\n\nResearch Summary\nWe evaluated a Dallas ordinance mandating that sexually oriented businesses (SOBs) close between 2:00 a.m. and 6:00 a.m., with a focus on arrests, calls for service, and offenses within 500 feet of 27 establishments. Using difference‐in‐differences models comparing restricted hours (2:00–6:00 a.m.) to unrestricted hours (6:00–10:00 p.m.) before and after enforcement, we found arrests increased 0.061 per establishment weekly (p = 0.024), whereas calls decreased by 0.108 weekly (p < 0.05, a 42.7% reduction) and offenses declined by 0.062 weekly (p = 0.054). Effects concentrated at moderate‐ and high‐activity establishments. Heterogeneity analyses further revealed that call reductions were concentrated among cabarets, whereas adult retailers showed no detectable change, and that arrest increases were similarly concentrated among alcohol‐serving venues. The arrest increase likely reflected enhanced enforcement rather than increased crime, as calls and offenses both decreased.\n\n\nPolicy Implications\nHours‐of‐operation restrictions can reduce secondary effects around SOBs while preserving First Amendment protections. However, such ordinances impose enforcement costs alongside crime reduction benefits, and effects appear concentrated among cabarets and alcohol‐serving establishments, raising questions about whether the compliance burden on lower‐risk venues such as adult retailers is proportionate to the public safety return. Our findings suggest targeted regulations focusing on high‐activity establishments may prove more efficient than blanket policies affecting all venues uniformly.\n\n"]