Joey Arias, a gender-bending performer in the mold of a 1930s jazz chanteuse, was in his element as he looked out on the hundreds of plumed, spangled and painted 20-something men and women crowding the dance floor of Susanne Bartsch’s weekly summertime party, On Top.

“Here we are, on top of the world!” said Mr. Arias, 67, with the New York City skyline visible through the windows at Le Bain, the Standard hotel’s 18th-floor boîte. The crowd, which spanned the L.G.B.T.Q. spectrum, cheered.

To the uninitiated, this was anything but a normal Tuesday night in the city. But “in our world, it is,” one guest in a top hat and tasseled mouthpiece said with a smile.

It was only a year ago that the world of L.G.B.T.Q. night life — in all its prismatic, out-and-proud glory — was devastated by the mass shooting in the Orlando, Fla., nightclub Pulse. Forty-nine people died and 58 were injured at a place that had been a wellspring of weekly celebration, especially for those in the gay Latino community. The tenor of L.G.B.T.Q. night life changed overnight.