Probably the same thing that happens anywhere that currency is unavailable or useless: - informal systems of credit - barter - alternative forms of unofficial

Probably the same thing that happens anywhere that currency is unavailable or useless: - informal systems of credit - barter - alternative forms of unofficial currency (e.g. Using food stamps or the equivalent for currency; using something like poker chips for currency) - using foreign currency This does put a damper on commerce, but prevents essential small-scale day to day transactions from grinding to a complete halt.