We may deliver impromptu sessions if enough people get in touch!
The impromptu session was recorded on video and later published.
Cash was also in the studio and the four started an impromptu jam session.
The jazz group joined in, and for 10 minutes or so there was an impromptu jam session.
The four then started an impromptu jam session, and Phillips left the tape running.
During the aforementioned party, an impromptu jam session took place.
Along with the impromptu jam sessions, unannounced guests often show up.
The night felt like an impromptu jam session, with plenty of technical hitches.
This space has been the main location for many recording projects and the site of many impromptu sessions.
This kind of impromptu session is called a sware lewoz.