Hi Gail, I moved your thread to this forum since the "jeremy's multimadrid.com" forum is only for feedback on the site and announcements of additions to the web.
Well, you must have missed the e-mail I sent out announcing my new classifieds section at
www.multimadrid.com/classifieds 
I also posted on it in the "jeremy's multimadrid.com" forum as I do when I add something new to the web.
There is an entire (and long) section on "clubs-general" under the "clubs" section that I think you will find helpful
The newcomers club and others are indeed there but the tel. #s you have for them are wrong, mus tbe old #s.
In the section you will find:
INTERNATIONAL NEWCOMERS CLUB
ENGLISH-SPEAKING WORKING MOTHERS
BILINGUAL SOCIAL CLUB
Oh... and this whopper under the "desperately seeking" section:
"I�M EXPECTING MY BABY IN DECEMBER. Are there any English-speaking mums to be in a similar situation or with young babies to share experiences? Also looking for baby equipment. Please call Patricia 91 447 62 50"
Now if that is not what you are looking for I do not know what is

Maybe the two of you can even start a new club (even if your kids are older).
You may also want to try the classifieds in the "Madrid" section of
www.spainalive.com . They have a "social/personal" section that usually has stuff like this in it.
Saludos & Suerte,
jer...
p.d. I am sure that if you also look through the entire classifieds section you wiull find even more that interests you