Two busiest places seem to be
Saxos - karaoke plus usually some entertainment each night
http://www.saxos.zapto.org
They are near the occidental glass fronted hotel
and
The lighthouse, not sure how to describe where it is, but if you head to the central end of the Main beach you will prob hear it !, not in there much myself but always busy and have stand up, band or singer on most nights.
only info I can find is
http://www.discoverlanzarote.com/the_lighthouse.asp
Kids not problem any ware really, only places I know that restrict kids are some of the hotels so u'll be fine.
Ian
Free Lanzarote Web site development and hosting
http://www.lanzit.zapto.org
Sandman
Back to Lanz next oct/07
http://www.lanzaroterentals.com
http://www.saxos.zapto.org