When you were young did you have relatives that had no children?

As children there were adult extended family around who did not have children.  We never visited them.  When some of them got married and had children my parents began to visit them with us children and to invite them to our home with their families.  It was the same for all my cousins as far as I know.  People without children simply did not host events.  It wasn't socially the done thing.  Not good or bad, just not done, like nobody eats dinner with paintbrushes.  It would have been an equally absurd thing to do.  Childless relatives only came to family Christmas dinners.  

When I was a child there was a sharp division between established couples and single people, and we knew no one who had children without living together as a married couple.  (I'm being careful of my language here because as a child I did not know anyone's legal status).  Single people living on their own weren't treated as full and proper adults socially, no matter how old they were.  They only started being invited to social gathering once living together as a couple.  They were not expected to host at home before they had children.

I only got to know one childless great aunt as an older teen.  The rest I have only said hello to at family funerals.  I'm not sure why you expect to be provided with "service relatives."  

My parents had no children. They were monsters.

Fair people should behave this way ...

Yes.  My little sister was one.

I had a widowed great aunt who was a kind and simple soul that never had children.  My parents would sometimes check on her and they brought me to visit, which made her very happy.  When my aunt had her final illness, I was a young teenager.  So, my mother made the adult decisions on her behalf.  

If this were asked where it should be, in Family or Polls & Surveys, I might have answered.

But, it wasn't.

Yes. Now they would be called DINKS (double income no kids). More often they visited us because they had a car and we didn't. They would periodically borrow me and take me out to Sunday afternoon dinner where I learned important stuff, like the cherries from the bottom of their Manhattans tasted better than cherries straight out of the jar. They both died at about age 60 when I was a young adult, and I inherited their car.

I had a number of relative who were childless - and still do.  I visit them often, but not as often as I wish because of the pandemic.

Yes, many. Hardly saw them at all for one reason or another. Most who had no children did not have the expense of raising them. They could easily afford to hire help as and when needed, and that is what they did.