It parks at the corner of Broadway and 37th, right outside a kosher deli and advertises that you can "do a mitzvah!" or buy shabbat candles.
I love the whole idea of this. The idea that you don't even have to go find a temple...there's one parked right outside your lunch haunt ready to fulfill your every religious urge!
I think every religion should do this, including the atheists. Can you imagine an atheist wagon? You'd never have to search for Ayn Rand again.