If you are at leisure yourself, on a beach, in a restaurant, or on a park bench and an attractive girl walks by, you can take the opportunity to ask her to join you. You may want to put in some' 'filler'" talk if you don't get an immediate "Yes," (and she is wavering). Coaxing and kidding are good even if you get a weak "No."
"Aw come on, I need the company," etc., etc.
Outstandingly interesting cars, motorcycles, horses, or any other similar possessions can be used in the same way. Remember, girls are always interested (if they are available) in meeting new guys, and anything that gives them the opportunity is fine with them.