Crate a leaderboard for groups to help with accountability and motivation and friendly competition. Would be nice to customize example weight volume, weight loss, run time, 1RM, or even goals such as water intake, workouts completed, x days hitting macros etc. this would be the same for everyone within that specific group and would run for a period of time and then changed to a different one to keep various types of clients engaged.

3 weeks at water intake
2 weeks weight volume
6 weeks weight loss

Etc hope this comes across clearly.