Having just set up a skating club, you need to get people to sign up to become members in it, so as to make it operational. You can’t claim to have an operational skating club, yet it has no members to talk of!
One way in which you can get people to sign up with a skating club would be by advertising it.
Another way in which you can get people to sign up with a skating club would be by approaching the said people directly, and requesting them to become members (if they happen to be folks who have interests in skating). This is something you can do on a one on one basis. This is also something you can do by way of calling the people on phone, and asking them if they may be interested in becoming members. It is, at yet another level, something you can do via email. You can, for instance, login to Yahoomail following the simple procedure in this post and having done so, proceed to send emails asking people whose contacts you will have obtained previously to consider joining your new skating club. You are more likely to convince them if you show them how your club is unique and beneficial to them.