Thank you kyle,
I really like the function of assistance but does not work on my site.
why not work?
In example:
User 1 invites 2 people to his group.
Everything ok. This is User 1
User 2 and 3 accept the invitation. But into EVENTO have no possibility to confirm the attendance. Take a look, this is User 2 and 3:
Where User 2 and 3 confirm ??
Attendance not appear in my site.
Thanks in advance.