Saratoga Springs bars are increasing efforts to keep troublemakers out. WNYT reports the first thing they’re doing is using an app that helps all the bars to instantly communicate with one another when someone’s causing a problem. They say a trespass letter signed by all the bars would prevent people like those involved in the shootout from stepping inside any of the bars again or be arrested. The operators are set to meet with police and fire departments again on May 17.