A waiting room is a building, or more commonly a part of a building, where people sit or stand until the event they are waiting for occurs.
Most waiting rooms contain seats for people so they do not have to stand. Some have adjacent toilets. It is not uncommon to find vending machines in public waiting rooms or books and magazines in private waiting rooms. In some countries there are special waiting rooms especially for those who have paid for them, for example at airports and railway stations. These will generally be less crowded and will have superior seating and more facilities.