What is East Bay?
1.
EAST BAY: East side of the San Francisco Bay Area.
Richmond, El Cerrito, Albany, Berkeley, Oakland, also (albeit totally undeserving EB status) San Leandro, Hayward, Fremont...
"Just take BART to the East Bay"
2.
Something out of the East Bay in NORCAL.
Dude! That's HELLA East Bay!
See