Here's how to log a workout from the group calendar for ALL group members at once, starting from the "Groups" tab of your Dashboard.
Step 1: Make sure your group has a group workout calendar active.
You can't log workouts for ALL group members at once if there is no group workout calendar.
Step 2: Make sure there are workouts set up on the group workout calendar.
If there is no workout scheduled, you won't be able to log for the whole group.
Step 3: Navigate to "Calendar" tab on group home page
Step 4: Select the workout you want to log, then confirm and log it!
Step 5: Fill in all workout info, and click the Log button.
Now that you can log a workout for all group members at the same time, you can keep large groups up to date.