Entertaining, breezy, gossipy (and sometimes bitchy) history of gay culture in the US from the 1940's through the mid-1990s.
The biggest shortcoming is its narrow scope. It focuses almost entirely on the history of gay white men. The "gay" part of it can be forgiven a little bit, since it's called the "gay" metropolis and not the LGBT metropolis. The author himself admits to that narrowness of scope.
What he doesn't address, and this is by far the book's biggest shortcoming, is that it's most heavily focused on white gay culture, with hardly any mention of POC. There are brief mentions of gay Harlem nightlife (but this is largely told from a white perspective, which, obviously, is...less than ideal, shall we say). There's no mention whatsoever of Bayard Rustin, for example, a Civil Rights hero who was not only black, but also openly gay. There were no stories told from a Latino or Asian perspective, for example.
I'm also regretting that the book was written in 1996, and has an afterward in 2006 or 2007, because so much LGBT history has taken place afterwards. Don't Ask, Don't Tell gets a very brief note at the end. The Defense of Marriage Act gets skimmed over in the afterward. Will and Grace gets a larger discussion than Ellen DeGeneres' coming out; Matthew Shepard doesn't get mentioned at all. And, of course, the afterward was written almost 10 years before Edie Windsor's case struck down DOMA, or James Obergefell's case legalized gay marriage; to say nothing of the (slowly) growing awareness of trans rights and all the culture wars that have been waged since.
Having said all of that, this is still a great read. Like I said in the beginning, it's gossipy and bitchy, and offers plenty of salacious anecdotes and stories, such as when General Eisenhower asked his secretary to root out all the lesbians in the army, and his secretaries told him that they could do that, but he'd find their names atop the list, upon which Eisenhower told them to forget that idea, then. Or the story of Storme DeLarverie, who ignited the Stonewall uprising, by explaining, "The cop hit me, and I hit him back." Or the tidbit about Bette Midler and Barry Manilow performing together at the Continental Baths. And so on.
So, this is a good read, despite the serious gaps in terms of coverage. I'd say this is a great starting point for anyone interested in gay history that covers how World War 2 inadvertently incubated a nascent gay movement, through the emergence of a gay subculture in the 50's, a muscular response through Stonewall in the 60's, the hedonistic 70's, the AIDS crisis of the 80's and the gay community's resurgence in the 90's.