by Stephen Thomas ErlewineThe presence of keyboardists Mark Rubenstein and Ron Morales spurs Sergio Lara and Joe Reyes to be more adventurous on Riverwalk, their fourth album together. While the album certainly features a number of long, gorgeous interludes that showcase the duo's impeccable guitar playing, there are also times for each musician to stretch out and illustrate he can play other instruments, whether it's Lara on the ukulele or Reyes on the oud. These add unexpected, exotic flourishes to an album that was already charmingly enchanting.