Antenatal classes normally include some things about what happens during labour, advice about going into hospital (or perhaps other options like birthing centres or home births - it depends on where they are, the organisation doing them and what those coming to the class want). They're offered as a way of helping women prepare for birth, and now they're often for couples not just for women.
If you're at work you're entitled to take paid time off for such classes.
An organisation called the NCT runs lots of such classes usually over a few weeks, can be evenings or daytimes but although you normally go near the end of pregnancy, they book up quite quickly, a lot of people seem to sign up for them about 12 weeks. The cost can vary a lot but it can be quite pricy. They are also popular in order to meet other women/couples having babies at about the same time, and often continue to meet after the course/birth. My class has had two meet ups, one when I was still working and one in the afternoon last week, and we've planned another one in a fortnight from then.
There are also other organisations which run similar classes.
Also, ask your midwife/hospital if they do any classes - often just one and not so good for the readymade coffee group, perhaps, but usually free and if you're going into hospital, a good way to get an idea about that hospital's usual procedures.
I would recommend some sort of antenatal class if you can get on one and afford it, I wish I'd been more prepared with first baby (I'm now expecting 2nd this month).