irstly, I think you are approching the issue in a negative way. Rather than how do I survive, what about how do I enjoy.
I am someone who loves mothers and babies groups. I just love asking questions, both about babies and work, life, holidays, something big in the news. I really enjoy them. I take them with a pinch of sale, rock up, get the babe out, he toodles off, I then mix playing with him and chatting with others. Sometimes a friend (yes, definitely friends now rather than just thrown together because of situation) from my NCT group, will join me, but sometimes I am alone - and I spark up a conversation or if someone does with me, I respond enthusiastically.
Just be friendly and relaxed. Worst case scenario and you don't manage to talk to anyone, focus on your babe, have a coffee, collect your bits and leave. Try again the next day / next week though.
Honestly, one of my closest friend I met at a mother and baby group. She was there alone. I asked if she wanted to join a friend and I for a coffee. She agreed. We walked home together afterwards and had the most open conversation and the rest is history. That was 15 months ago and I now count her as one of my very closest friends.
I want my son to grow up seeing relaxed, sociable and confident parents. That is how I viewed my parents as, and it makes life so much easier.
It is worth taking the risk