At the Holiday Inn, 2 blocks up the street. Regency will validate your parking ticket.
Take a Lyft if you can.
There is no parking in regency ball room.
Lyft or Uber, or scooters
There are garages in the area. Parking is not easy. The times I've been there, I was on the event staff, took BART and then the AC Transit overnight bus back to the East Bay. Obviously easier if you are in the city. Regency Ballroom is nice e tenths of a mi from Civic Center BART, however.
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