Marketing Ideas

Hi All, I currently teach pole fitness dance and chair inside of a local gym. So far for marketing I have been going heavy on social media and I have posters around the gym. I put out about 100 flyers and they are all gone. So I am assuming people are taking them. I was offering a buy one get one free deal and many people have taken advantage; however, many do not return to purchase the packages. Which I know will happen, looking for some more ideas to get students in the door. Any recommendations will be much appreciated. Thanks!