That's the gentrification pattern repeated time and again -- gay men move in to run-down neighborhoods first, because a household of nothing but young men is less afraid of being mugged, and a household without kids isn't deterred by bad schools. Then come the artists (considerable overlap with the gay men), who need a lot of space and don't have a lot of money.
Once you have a neighborhood full of artists, you have all the ingredients of a trendy spot. So the bars and funky little shops move in. Before long, the neighborhood becomes a magnet for straight singles and young couples. As property values go up, families and chain stores start to take an interest. After a while, the artists and funky little shops either ride the rising tide or can't afford the rent any more, and move on to start the process over.
It's been most pronounced in NYC, where that pattern was followed in Greenwich (and later the East) Village, SoHo, Chelsea, TriBeCa, and is in progress in the meat-packing district and starting in Alphabet City. In Atlanta, I've seen it in Virginia-Highlands, Poncey-Highlands, Grant Park, Inman Park, and most recently Cabbagetown and Kirkwood. I'm sure other cities have similar stories, but I don't know them.
I'll bet. :-)
Petworth and U Street in D.C., in addition to the longtime gay enclave Dupont Circle.
Street crime is high in U Street because the gentrification has swung all the way over to trendy college kids and there's a lot of cash walking around on weekends. Petworth is a different story. The first time I visited my friend there after she and her fiance bought a house, I wanted to walk and talk around the neighborhood. She said it wasn't a great idea and I should carry her stickball bat because there was a pit bull loose that day. Yikes. But that was five years ago and it's better now, though still pretty rough.
I was looking to buy a house last summer and learned a lot about how neighborhoods move up and down. There really are worse things than having gays (and, less specifically, artists) terraform a block and move up property values, or at least hipness and desirability. I would have bought in one of those neighborhoods but it was too far from my job.