The 23rd Street Café has been featuring jam sessions since 1988. Mace Thompson, the owner, opens his establishment only on Tuesday evenings, 7:30pm to 11:30pm. There is no cover charge.
Alas, nothing lasts forever. The Philadelphia Inquirer reports:
After 25 years and more than 1,300 Tuesday-night jazz jam sessions at Center City’s 23rd Street Cafe, the horns, drums, basses, guitars, violins, harmonicas, and singers will soon be silenced for good. The property at 223 N. 23d Street will be demolished this summer, likely to make way for condominiums.
But all is not lost. The jam sessions will resume on Tuesday, August 4th at the Manayunk Brewery.
For updates, join the 23rd Street Cafe Facebook group.