I second hester, warthog and lobsters.
I did NCT and NHS classes!
You won't learn anything that you can't get out of a book, midwife or NHS class but
1 - You will be able to discuss everything in an open forum, with guidance to the pros and cons, regardless of the hospital agenda/policy etc.
2 - You will make friends with people who will have children the same age as you. My DS is 5 months old now, and believe me, in the early months of having a new baby all the friends and activities you did before hand, come a distant second to what you can do with babies and new parents.
Apart from the social side, the "role play" c Section was the most usefull thing to me. I ended up with a much dreaded and much unwanted emergency CS, but at least I knew what was going on and why, and what the 10 medical personel were all doing there!
After the babies were born, we too kept Costa in business, but now go round to each others houses mostly, but see each other about once a week.
I didn't feel that the classes were at all hippyish or rose tinted! - Quite the opposite, I found them sensible,informative and reassuring. And actually quiet good fun. DH came to them all aswell, and keeps in touch with the Dads. They have been out drinking a few times, to the football, for meals. And we have started babysitting for each other too.
I also did the "Early Days" classes. The group of 5 was made up of 5 of the 8 of the antenatal classes, so we bonded ever more. I also found these classes very valuable. They are not so much about the "mechanics" of looking after a baby (we'd kind of worked that one out by then), but about how it affected us, what being a mum meant, parenting styles, sleeping (mums and babies)and a good session on weaning.
But then, in this area the didn't cost £280!