If I belong to another gym, can I go here for a day just to try it out

You can ask them if u can try it out. They may let.

Unless you have a black card you wouldn't be able to. But they might be nice and let you try it out

Thank you I'll try it

There you have it.

There is a charge to try the gym for a day. But maybe if you belong to another PF they might let you try without charge.