Coming after the determinedy avant-garde recordings that were "Weather Report" and "I Sing The Body Electric", "Sweetnighter" was the beginning of Weather Report's journey into funk. While the rhythm section of Miroslav Vitous, Eric Gravatt & Dom Um Romau remained in place, it's the rhythm, rather than the feel of Zawinul's synths & Shorter's saxes, that sets this album apart from its more academic predecessors.
It would be possible to write 1,000 words about the 13 minutes of "Boogie-Woogie Waltz" alone. In fact, the album would still deserve 5 stars if the remaining 32 minutes of its playing time were made up of silence or white noise. Let's say no more than that "Boogie-Woogie Waltz" is spectacular: a measured crescendo of funk rhythm, pulsating bass, crackling electric piano & synth and staccato sax that resolves into as fine a piece of ensemble playing as Weather Report ever produced. If you're familiar with Cannonball Adderley's live recording of an earlier Zawinul composition, "74 Miles Away" you might be prepared for the pace of the build-up and the intensity of the climax.
After that, everything else on the album is bound to be a let-down, so it's probably appropriate that the next two tracks are low-key hark-backs to the days of "Weather Report". "125th Street Congress", however, provides some further indication of the directions in which the band's music was to progress, acting as a pretty accurate trailer for the content of of "Mysterious Traveler" and "Tale Spinnin'". Although the production is as spare as that of side one of "I Sing The Body Electric", the feel is warmer and the rhythms retain some of the funk of "Boogie-Woogie Waltz". "Will" is even more of a future echo, sounding very much like an out-take from the "Black Market" sessions. The album closes with "Non-Stop Home", in which synths & bass build an elaborate bridge between the poles of rattling percussion before Wayne Shorter joins in with some fierce sax blowing.
It's very difficult to recommend one Weather Report album before any other, but if I had to recommend just one song it would be "Boogie-Woogie Waltz".