His bar began alerting its patrons about the new policy on Wednesday before it officially goes into effect on Aug. 'We thought this was probably the most reasonable approach,' Triangle Denver's managing partner Sean O'Grady said. Triangle Denver, X BAR, Tracks, Trade and Denver Sweet are joining a growing list of businesses in the metro to implement these policies. DENVER - Almost all of Denver's LGBTQ bars are beginning to, or will soon, require proof of vaccination status or a negative test result to enter because of concerns over the delta variant.