1.   In these rustic pavilions, dozens, sometimes hundreds, of amateur players gather for impromptu jams.

2.   Old-time music competitions, juried arts and crafts show, historic photo exhibit, heritage activities for children, shaped-note singing and impromptu jam and singing sessions.

3.   Sunday night at a local jazz club, Robinson was handed a sax for an impromptu jam and proceeded to bring down the house.

4.   But it would take a few solid months of psychotherapy just to be even able to do an impromptu jam.