Generally, you cannot swipe the same credit card twice for lounge access unless your specific card benefits explicitly include complimentary guest access. Most lounge operators and programs like Priority Pass or LoungeKey verify that the name on the card matches the boarding pass; therefore, swiping twice for two different people on one card is usually blocked by the system. However, if your card allows for "unlimited guests" or a set number of guests per visit, the lounge agent will swipe once and register the total number of people in your party. If you are trying to use the same card for two separate visits yourself (e.g., leaving and coming back), some lounges enforce a 2-to-3-hour re-entry limit. For 2026 travelers, a high-fidelity alternative is to have your companion added as an authorized user or "Add-on" cardholder, which often grants them their own independent lounge membership and allows both of you to enter together legally and seamlessly.