At 1:30 to 3:30 there is an all levels class with rotating teachers from around the bay area. Doors open at 1:30 class starts up at 1:45.
Then from 3:30 to 6:15 there is an unstructured jam. This is the longest running jam in the bay area. Things generally quiet for the first 45 minutes. Then more people show up (10 to 20). The studio is about halfway down the big hallway on the right, a blue door.
Cost is $12 to $15 for the class. $5 to $10for the jam.
Every week, cancelations if they occur are announced on https://www.facebook.com/groups/saturdayBerkeleyJam/
Class 1:30 to 3:30, Jam 3:30 to 6:15