A term, not a taster
A class is a different commitment from a workshop. These are full semester-long courses taught conservatory style - a small live group meeting every week, with real coursework between sessions and a teacher who comes to know how you play.
Small groups, meeting weekly
The group is kept small on purpose. Semester study only works if the teacher can hear each player, and if the same people return each week. That continuity is the whole difference between a class and a series of one-off sessions.
The work between the sessions
The weekly meeting directs the work rather than containing all of it. Coursework between sessions is what turns a term into actual progress instead of a set of enjoyable evenings.
Register by term
Classes run in terms and you register for each one, reserving your seat with a deposit. Seats are limited by the size of the group, so a term closes when it is full rather than expanding to fit demand.