"Keep Yourself Alive" (with impromptu jam before the song) (May)

Lasting over nine minutes, this version was essentially an accidental, impromptu jam between Clapton and Duane Allman.

It was done here tongue in cheek with ad-libbed humour from Sisto during the impromptu jam.

With all of that talent packed into a private train, impromptu jams fueled by drugs and liquor started up in every car.

Bottom, from left, Caribbean music groups held an impromptu jam at the 72d Street Band Shell.

The tracks featured here are song sketches, outtakes, demos, impromptu jams, and goofing-off.

The fourth disc consists of impromptu acoustic jams recorded during 1994 and 1995.

These impromptu jams cost nothing to watch, and the music is as down to earth as the bay shore itself.

Expect a relaxed vibe, a 25-to-35 crowd, impromptu musical jams and the odd game of pool.

Some women begin an impromptu musical jam and then a live music stripper show.