Parking is available on Easy Street or via valet service for $10.
Slammer accepts ATM cards but does not accept cash.
The entrance is somewhat hidden, so look carefully for it.
A few nearby places worth checking next.
I have been using it now for 3 months and it saves me so much research. Reduces the need to call and double check every time.
How did I not know these places existed?! Atly's scoring is a lifesaver, now I can finally find THE spot without wasting time Googling my life away.