If you do not intend to go there is no need to RSVP no.
There is a $5.00 fee for drop in. This is not a meet up fee, this is what the community center charges. You can get a membership and purchase advance tickets which is a bit cheaper.
You will need to bring your own racquet and birdies.
There is a group of people who attend on a regular basis, this is a drop in event so you will get to play.