The question is whether a real bohemia is even possible today.
The first requirement is a tight neighborhood, as existed in Greenwich Village once upon a time, or in Paris in the 1920s.
I'd guess that classic bohemias were mixes of lower class and idle rich, or radical rich. Without the low rent aspect there's no authenticity, no edge.
How many American urban neighborhoods are full of vibrant life yet affordable at the same time? (Detroit's Cass Corridor in the 1990s.)
The Hydrogen Jukebox has created a scene in West Philly-- but West Philly is too sprawling, the writers here scattered all over the place. South Philly might be tighter; Fishtown more working class, with more real bohemian freedom.
Most interesting urban neighborhoods have been taken over by the gentry-- hyper-conformist rat-race yuppies who are if anything anti-bohemians. Rents and prices exclude all but the Clean and Saved.
Bourgeois conformity has spread into most segments of the upper class (even ultra-rich guys like Tom Beller and Rick Moody obtained writing degrees) and swept through the lower middle class from whose ranks come many MFA writer-wannabes. True artistic and social rebels are a minority of a minority.
Also, few writers today except those of means will travel to be part of a scene-- as many writers like Hemingway, Robert McAlmon, Kay Boyle, and so many others moved to Paris to create the Lost Generation.
Sorry, but one can't have a community of writers through the Internet, which is a collection of disembodied voices without the exciting interaction of physical reality. At best it's a bloodless, enervated, unsatisfactory substitute.
Those who pose today as literary bohemians are in fact anti-bohemians. Take MediaBistro, a walking contradiction; an impossibility-- a mock-bohemian scene constructed around career and conformity. Their reality is anti-bohemia (as they're so thoroughly anti-ULA). Only the pose of difference remains-- and as everyone inside the System adopts the pose, any trace of difference from acceptable life and culture has thoroughly vanished. All that's left is consumerist advertising.