If you don't know how to find a topic, is it okay to get familiar with it? Every time you can exercise near the fitness equipment near the chat-up object, when you have eye contact with the other person, smile and politely nod to her (note that it is a natural smile, you can laugh shyly, but you can't laugh obscene). If this continues for a week, you can greet and chat with him normally. At this time, because of the previous preparations, he will not ignore you who are friendly to her because of strangeness.