Have to admit that I never went to any Mother & Toddler groups. Closest i got was going to the breast feeding support group for ds' first 4 months, beforeI went back to work!
I don't really have many friends locally: a combination of being an older mother, having gone away to Uni (so my friends from Uni are scattered all over the country), having worked in Egnland for 10 years after I graduated, working full time now .........
So I don't really have any school or uni friends to fall back on either! I was from the North side anyway - Bearsden/Milngavie - (there, I've given myslef away as a snob! 
) and now I'm on new territory, Pollokshields.
Am only now, over 13 years since I moved back to Scoltand ( to be with now dh) starting to make "new" real life friends: for example, the mum of the boy across the road that ds plays iwth. I've also met up a few times with a mumsnetter who I met at a meeting least October.
One of my other friends is a South African who has young twins. She has been "adopted" by my parents, who are like surrogate grandparents to the twins.
It is difficult to make new friends: I often wish I had a local friend like my best friend, who lives in North Wales.
With working full time, it is difficult to find time to do "new" things where you would meet others. My weekends are precious times to spend with dh and ds - and to catch up on housework! 
. And week nights I am too kanckered to think of doing anything, although once a week, I do make time to go to a Pilates class.
one day, I will get organised enough to do other things!
I used to be good at making freinds in new places: after all, I met dh in Miami, at Junior Chhamber World Congress and I have various friends still from the different places I lived when I worked in England.
I also lived a year in France during my degree, so I've also lived in a "foreign" country.
Anyway, why not come along to the next Scottish meet-up anyway - even if we are not "foreign"!