Actually, in the City of Vancouver it was worse: 1 space/6 seats, or 12 ft. of bench length in the main auditorium.
In my current town it's 1 space per 5 seats, and may include off-site parking in adjacent commercial lots.
Oh yeah, in the City of Davis, CA... it was 1 space per four seats in the main auditorium.
That's all I can remember off the top of my head. And actually, I'm a little scared that I can remember parking standards from 10 years ago... of course, they used to call me the Church Lady back in the day. I hope you don't get the same moniker.