Hiya nat, I never went to any with Mini Boo as my experience with the one I attended when pregnant with teen Boo still haunts me......
We all had to wear name badges, and stand up in turn and tell everyone else that "...my name is......, and this is my 1st baby" etc.....it was awful. Then later on when it was Q&A time, someone asked the midwife/HV what their opinions were of baby slings, to which she said she didn't like them, thought them dangerous as she knew a woman who whilst wearing one leant into the freezer section at Asda and the baby fell in. To my mortification I burst out laughing, and everyone else looked at like I'd personally murdered a baby right there in front of them.
needless to say i didn't go to anymore.