What is it about jazz music that associates it with late nights? Oh sure, there is jazz that's played in the afternoons, but it sometimes feels as much like jazz as Pat Boon is rock and roll. It's polite and well mannered music that you can bring home to meet your mother and she won't throw it out into the street. No, there's just something about the music that calls for the atmosphere that is generated in a big city long after daylight has vanished.

Speakeasies, after-hours bars, and other late night venues just feel like they are made for jazz. Perhaps it's the seductive sound of the saxophones, the soft hissing of a snare being brushed, or the gentle thrumming of the stand up bass that makes the music feel like it needs the soft velvet of darkness for it to thrive. There is something almost magical about the way the elements of a jazz tune come together that makes it feel so ethereal that daylight would burn it away.

There is also something about music being performed in the wee hours of the morning that gives it an extra spark of excitement. Perhaps it's some sort of connection to our genetic memory of a time when we performed rituals in the deepest part of the night to aid in our communications with the spirit world. All I know is that one of the most memorable memories I have of jazz was listening to about a dozen saxophones playing in a fourth floor studio at three in the morning in downtown Toronto.

For the past fifteen years the Chicago jazz band Sabertooth has been playing a Sunday morning gig that starts at midnight and winds down at five in the morning at the venerable Green Mill Tavern. (The Green Mill first opened its doors in 1907) It says a lot about their quality as a band, and the enthusiasm of Chicago's jazz fans, that there is an audience for this show week in and week out. However, I bet that a fair number of the audience members are as attracted by the event as much as they are the music. It's still a pretty unique experience to listen to jazz until the sun comes up the next morning.

For those of us who can't get to Chicago on a regular, or even an infrequent, basis to catch Sabertooth live at the Green Mill, the good folk at Delmark Records have released Dr. Midnight, Live At The Green Mill. The seven tracks on the CD were all recorded live on June 23rd 2007 during the quartet's regular Sunday morning gig.

It's obvious that these guys are aware they are doing something just a little bit different with this gig. On the introduction to the title track, "Dr. Midnight", Cameron Pfiffner, makes mention of the time of day's special qualities. He talks about the sounds that you can hear during these hours and wonders if they are messages from people on the other side. That's where Dr. Midnight comes in, as he's someone who can interpret what these sounds mean.

Pfiffner is joined as lead in the quartet by fellow tenor saxophone player Pat Mallinger. Aside from each playing tenor, Pfiffner also plays soprano saxophone, concert flute, and piccolo while Mallinger plays alto sax, and Native American flute. Rounding out the quartet are Pete Benson on the Hammond B3 organ and Ted Sirota on drums. It's not what most people would expect as a standard quartet line up, but these guys aren't exactly what you'd call, if there could even be such a thing, your standard jazz quartet.