I've checked in your site, it seems like that "invite friend" button did appeared, you can check my attached screenshot below.

By the way, make sure you have joined the group.

Ah, OK thanks Arlex I must have missed that...

Is it only 'friends' that can be invited?

You're welcome Peter

Yes, can invite friend only for the group.

You're welcome Peter

Yes, can invite friend only for the group.

OK thank you.... There seems to be a setting that says otherwise, does this setting not work?

Ops, I missed this feature in Easysocial 2.x, thanks for pointed up this

By the way, I've tested on your site, it seems work fine for me, you can check my attached screenshot below.

May i know which user you trying to search? So I can able to investigate on this?

Thanks Arlex, that's fine now I can see where the invite button is.

It's just that I wanted to create a new group and invite a bunch of members who are not 'friends' and I thought that setting would allow that

Thanks for getting back to us everything is work fine now.

As a gentle reminder, kindly start a new thread if you have any other issue in the future so it will be easier for us to manage your inquiry. I will lock and mark this thread as resolved.