Often an afterthought in most neighborhoods, the alley is kind of a special thing in Midtown. There's Dally in the Alley , one of Detroit's longest-running street fairs, which celebrates the Cass Corridor with local music, art, and food vendors lining a neighborhood alley. There are the green alleys , which convert typically dank and uninviting alleys into charming walkways, complete with green methods of storm water management and the reintroduction of native plants. There's even the Garden Bowl, which, at over 100 years old, is the oldest continuously operating bowling alley in the country.A new micro-festival will debut on Saturday, September 10, the same day as Dally in the Alley. The new event is called The Green Alley Gathering and it takes place in the Green Alley adjacent to Jolly Pumpkin and Third Man Records . Organized by Porterhouse Presents, the Gathering will celebrate the community and promote Midtown Detroit, Inc.'s Green Alley construction projects throughout the neighborhood.Two music stages will bookend the alley, plus Man & Pan Paella will be serving their traditional meat, seafood, and vegan Spanish paella. A cash bar featuring Jolly Pumpkin, North Peak, and Civilized Spirits adult beverages will be located in Third Man Records.Booked to play the first Green Alley Gathering is MarchFourth, a genre-mixing party marching band that also features acrobats and stilters, the Craig Brown Band, a local country-rock group recently signed to Third Man Records, and the Silent Disco, a multimedia experience that has listeners wear headphones at the concert. Silent Disco will include sets from DJ Psycho, DJ Prim, and more.The Green Alley Gathering is Saturday, September 10 and runs from 6:00 p.m. to 1:30 a.m. Tickets are $10 in advance and $15 at the door. It is located in the Green Alley between 2nd and Cass Avenues and West Canfield and West Willis Streets.Dally in the Alley is Saturday, September 10 and runs from 11:00 a.m to 11:00 p.m. between Forest Avenue and Hancock Street and 2nd and 3rd Avenues. The event is free.Got a development news story to share? Email MJ Galbraith here or send him a tweet @mikegalbraith