Ohaiyo gozaimasu Mina San/good morning (it's early literally) everyone.

In the bio of Shunryu Suzuki Roshi, crooked cucumber, there is mention of chosan, a Dharma talk over tea. It is mentioned that he did so with his senior students. So, my question is, is chosan done with only senior students, or can it be done with the entire Sangha? Also, does anyone have the kanji for chosan, and can explain the kanji's meaning? I think it would be great to learn and teach chado/chanoyu (tea ceremony), and share the Dharma over tea. Thanks in advance.

Gassho
David Somers