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.