Squad X App offers a great platform for Users to Create or Join activities.
You can create a new activity, and then book the venue where it will be held and ask your friends to join. Also you can make your game public and other users on Squad X could join the game. Also you will be able to split payments between the different activity participants. With that each person would pay for their share.

If your looking to get active without going through the entire hassle of organizing an activity, you can simple browse the available Public games which you can join with a few clicks.