In one sentence, describe what the following article is about:

If your goal is to observe the elderly, head to a retirement home. If you want to find families, post up at your local mall. If you do have a goal for your people watching, don't head somewhere that won't have anyone you are interested in. If you are not planning to people watch, you might not get to choose when or where you start. Standing in line at the doctor's office or sitting in a waiting room are great chances to observe people. People watching isn't any fun if there aren't people! Avoid places that don't have many people and instead head to places like malls, zoos, parks, and stores that you know will be crowded with people. Places are more likely to be full of patrons on the weekends or during the summer when children are not in school. Dog parks, art galleries, public transportation, and tourist spots are all great places to people watch. If you people watch in the middle of a walkway, people are bound to run into you and interact with you. To people watch undisturbed, tuck yourself into an out of the way corner where you can sit down. A park bench, a corner booth at a cafe, or a bench in the mall are all great spots to sit. Try to sit somewhere high up whenever possible. Balconies and rooftops are the ideal spots in a building.
Find an area with the demographic that you want to watch. Go to an area that is well-populated. Sit in a spot where you're out of the way.