session

ot noun

1. A period devoted to a particular activity, e.g. the annual or semiannual periods of a legislative body (that together comprise the legislative term) whose individual meetings are also called sessions. "Are we having a recording session?" / "Yes. We've even got some session musicians to provide some brass."
2. A meeting of a council, court, school, or legislative body to conduct its business. This court is now in session.
3. The sequence of interactions between client and server, or between user and system; the period during which a user is logged in or connected. Logging out or shutting down the computer will end your session.
4. An informal gathering of musicians to play music, especially improvised jazz or a similar genre.

fe’l verb

1. To hold or participate in a jam session with other musicians.