Thanks to a Flossmoor block party, a new jazz recording is born. On June 7, Rob Ryndak and Tom Lockwood will release “Gratitude.” A release party is set for 7:30 to 9 p.m. on Saturday, June 8, at PianoForte, 1335 S. Michigan Ave. in Chicago. Tickets are available at www.pianofortechicago.com.