"To order a drink" means requesting a beverage, usually in a restaurant or bar, by telling the server or bartender which specific drink you would like to have. Full definition
Come another time without the kids and order a drink in a honey bear glass. (chicagoparent.com)
You should still be able to cover the essentials, but it might mean cutting back a little on costly habits, such as ordering drinks at dinner or eating out for lunch. (discover.com)
Your dinner is accompanied by tea and coffee, or order drinks from the onboard bar service (own expense). (virtual-fiji.com)