Past albums from New York-based guitarist and singer-songwriter Chris Bergson have often straddled the line between blues and soul, especially those with vocalist Ellis Hicks. Yet, there have also been jazz tracks on his previous albums. After all, Bergson was a student of jazz great guitarist Jim Hall and has consistently expressed an affinity for Grant Green’s soul-jazz. Now, on East River Blues, Bergson collaborates with two of the most sought-after musicians in jazz. They are bassist Larry Grenadier (who has played with the likes of John Scofield, Brad Mehldau, Charles Lloyd, and the recent debut from Gabrielle Cavassa, released just two weeks ago), and drummer Herlin Riley, the premier New Orleans drummer, who has backed such giants as Dr. John,…