Yes - what Least said.
There is no necessity to contact anyone before you go. Some people do so, but people are friendly and will show you to the kettle / tea / coffee and chat to any newcomers. (We've all been new ourselves and remember what it's like). Main things I wasn't prepared for...
- Some meetings pass round readings for everyone to take a turn reading aloud from - if you're not comfortable reading it out you can just say 'pass' and pass the sheet to the next person - nobody will mind in the least
- There is usually a collection at some point in the meeting to cover running costs so it's worth making sure you have some change in your pocket
- Most meetings end in everyone hold in hands in a circle and saying a prayer together (Serenity Prayer where I'm from, but I believe it's not always that).
- Some people (me being one of them) can find their first meetings a little overwhelming and can get a little teary-eyed. Might be worth having a tissue in your pocket if you could be that way inclined