We're staying at CBR and I expect to have to do a couple loads of laundry through the week. What do the machines run on - quarters? And if so, where can I get change? (I could bring a couple rolls with me, but they'd be Canadian, and I'm not sure the machines would take them. I always assumed they were identical - but we have a self-pay machine at our grocery store that won't "register" American coins - they just drop straight through to the coin return!)