When I had twins, (they were nos 4 &5), I was horrified to discover that not all twin mums were as delighted as I had been. Indeed, one such person told me that she had hoped the second baby would be born dead!!!
Using my experience of Playgroups, Parent &Toddler groups, I started one covering a fairly large local area just for Mums (it as always Mums in those days) with multiples.
My first two had been born eleven months apart, so I was always able to fend off those who told me that their two (14 or 15 months apart were 'the same as having twins).
So, with two other twin Mums we started a local Twins Club, just meeting up once a month for the children to play and Mums to exchange clothes, idea etc.
Within a short time we reached 80 sets of twins for a Christmas party - this attracted attention from the national press, and the subsequent story was what led on to many other other people contacting me. Some to say they had something similar running in their areas and other to say how much they would like something similar.
Amongst those contacting me were Doctors, Health Visitors and the like.
At the time I was a breast feeding Counsellor with NCT and they very kindly let us use their HQ in London for that first Conference of the different Twins Clubs around the country. Looking back I suppose I had a cheek, just arranging that Conference, but it worked out well, and formed the Twins Club Association, which eventually became Twins & Multiple Birth Association - which today is a very firmly established and very wonderful charity.