I would like to talk about yesterday's rehearsal of my workshop: guitar, two keyboards, double bass and drums. Vocalists, to everyone's joy, did not come; and we were able to fully surrender to work on Dat' Der' by B. Timmons, and especially on improvisation. Between the three soloists, the keyboard player was the most advanced improviser, the pianist didn't feel very good in the improvisation line, while the guitarist had only blues phrases in his pocket, which he played rather randomly inside the chorus. Then I suggested playing in pairs for a long time, changing every four measures: keys (with the sound of a flute) and piano, keys and guitar; later keys, piano, guitar and bass. I practice this from time to time with every ensemble, and the students really like it. Sometimes I ask students to conduct a preliminary verbal dialogue, and then move on to instruments. There is no zero, the effect returns every time; this is the group dynamics, which begins to pull out from each much more than he could give alone.
Everyone began to play much better, the guitarist forgot to be afraid, and began to give out good blues ideas that he had not played before; and even the sound has improved. The keyboard player also improved, and his solo even deserved the transcription. By the way, during this session I did not have to play at all.
A student who has never been in this situation will not know what he is capable of! Ordinary jams in clubs do not provide such an opportunity.