1.   The band gave an impromptu concert.

2.   The impromptu concerts have been written up in national magazines and people travel hundreds of miles to take part in the fun.

3.   Also at the behest of teammates, he was now performing an impromptu concert.

4.   An impromptu concert was held at Bethel featuring Havens, Melanie, Country Joe McDonald, Mountain, Soul Asylum and Canned Heat.

5.   As the villagers stare, dumbfounded, seven musicians file onto the runway and give an impromptu jazz concert.

6.   Florida songwriter and balladeer Jimmy Buffet, a frequent visitor to the Island Hotel, used to give impromptu concerts in the Neptune.

7.   Greg Bressani, a Coconino National Forest ranger, was providing this impromptu concert as he stood by a wall of the Palatki Ruins.

8.   In one lovely sequence, Floyd, Canewell and Red Carter offer an impromptu concert.

9.   On the last day of the festival, a commemorative Mass is said, sometimes followed by a procession to his grave and an impromptu concert.

10.   Some of the best seats for impromptu concerts are on the staircase.