I think you'll find that they are....
http://www.equality.ie/index.asp?locID=77&docID=-1#q2
The family status ground: Pregnant, a parent of a person under 18 years or the resident primary carer or parent of a person with a disability;
Here's a case with the findings of the Equality Authority in such an instance:
I believe that the legislation has since been amended to allow for the refusal of entry of adults with children to licensed premises. I think this includes licenced retaurants.