Not all Samesun hostels have Laundry facilities, here is a detailed list.
Banff: On-site laundry services
Hollywood: On-site laundry services
Montreal: On-site laundry services
San Francisco: No laundry available
Toronto: Laundromat across the street
Ocean Beach: No laundry available
Vancouver: On-site laundry services
Venice Beach: No laundry available