A practical guide to group dinners in Vietnam — what the till can and cannot do, who should hold the bill, and how everyone gets paid back.

For anyone landing at Noi Bai, Tan Son Nhat or Da Nang who wants to know exactly what the ride into town costs and which payment method will actually work at the kerb.

For anyone crossing to Phu Quoc or Cat Ba on a tourist visa and wondering whether the ticket window will take their card, their cash, or neither.