I remember those days, I was part of a "clinic group" run by the local doctor's surgery. This ran once a week when the babies were newborn until 3 months old.
We all got on well so decided to keep these meetings up every fortnight, taking turns at each other's houses. There were 6 of us, and most would say, "We should be there", but weren't definite.
I would always go, out of politeness but it did dwindle to maybe just one or two turning up as the weeks went on, much to the annoyance of whoever the host was, as she'd obviously spent all morning preparing with a young baby to see to!
On one of my turns I phoned around the day before, to be told, "We'll probably be there", "definitely but not till later", etc.
Anyway nobody turned up, I'd spent the whole morning clearing up, putting out enough baby toys + had baked cakes the day before.
The baby had been crying + I'd wasted her nap time rushing around when I could have been doing other things or had a rest myself! At the time these things are a big deal, I opted out of the group eventually!