Starwood Hotels typically require guests to be at least eighteen years of age to book a room. This age requirement is common in the hospitality industry, as it ensures that individuals making reservations have the legal capacity to enter into binding contracts. However, it is important to note that specific age policies may vary by individual property, as some locations may have their own set of guidelines. For instance, certain hotels might allow younger guests to check in if they are accompanied by an adult. Guests considering a stay at a Starwood hotel are encouraged to check the specific policies for the property of interest, which can often be found on the current website or by reviewing the terms and conditions during the booking process.