IDs are generally not checked. If this is a private prty, then all good, but if this is a public setting for the party, keep an eye on your teens and do not allow them to go off-site with other teens who claim there are better parties elsewhere.

Yes, identification is strictly checked in the Bahamas, both for entry into the country and for various activities once you arrive. For U.S. citizens, a valid passport is required for entry if arriving by air. If arriving by sea (such as on a cruise), a Western Hemisphere Travel Initiative (WHTI) compliant document, like a Passport Card or an Enhanced Driver's License, may be sufficient, though a full passport is always recommended. Once on the islands, you will need a government-issued photo ID—such as your driver's license—to check into hotels, rent vehicles (including golf carts on islands like Bimini or Harbour Island), and for age verification at bars and liquor stores, where the legal drinking age is 18. Local authorities and "Royal Bahamas Defence Force" officers may also perform spot checks in certain areas, particularly near marinas or during inter-island travel. Additionally, if you plan to use a credit card for significant purchases, many merchants will ask to see a photo ID to prevent fraud. It is a good practice to carry a clear photocopy of your passport and keep the original in a hotel safe, though you should always have some form of valid photo identification on your person when exploring the islands.