On July 18, New York’s tiny Rockwood Music Hall Stage 2 will host an intriguing night of music. The performance is billed as Chris Barron, Eric Schenkman, Mark White and Aaron Comess, who also happen to be the four founding members of Spin Doctors. The free show is slated to start at 10:30 PM. The Spin Doctors spent last year touring in celebration of the 20th anniversary of Pocket Full of Kryptonite. The band is rumored to be working on a new, blues-based studio album and will likely use next week’s show to test out some new material. Both Barron and Comess have played Rockwood many times with their solo groups.