I think that using the Concierge that way is okay.. Especially since your family wouldn't have been able to get in the lounge on their own without you there to escort them...

I've called the YOW concierge on a couple occasions where my wife got caught in really long line ups and paged me for help... She is hearing impaired and although they were calling people out of the line, she had no idea what was going on... She's been in jeopardy of missing flights because of that... (even if she was 90 minutes early for a domestic flight)

B