I mentioned this in a different thread a few days ago, but I figured it warranted its own post. A new homebrew shop is going in at 700 Washington Avenue in Prospect Heights, Brooklyn. I know the owners personally. They will be selling all manner of homebrew supplies, including organic grains and kits for apartment brewing. They will also have space in the shop for classes, and they will have a program to allow customers to brew larger batches of beer on premises. The shop should open by the end of the June.
They have been running classes around Brooklyn recently under the name City Brewshop, although the storefront will likely have a different name. http://www.citybrewshop.com/
They also have a kickstarter page set up if you'd like to help them get off the ground. http://www.kickstarter.com/projects/1768322178/city-brewshop-electric-brewery