Visiting Meditation Groups.
Most Buddhist Meditation Groups or Centres welcome visitors. Here are some hints on how to go about it (some of which you will not find in Buddhist books!)
Contact the group before you visit to fix a convenient date and time. Ask them to send you some information about the group. Let them know the purpose of the visit - is it to have a look around the centre/monastery, to find out more about Buddhism, to get an introduction to their particular practice or because you are considering joining. Some groups hold special introductory meetings or open days, so try to go to one of those if you can.
Arrive on time, or a bit early if you can; try not to arrive after a meditation or ceremony has started. If the group has made special arrangements for your visit let them know if you have to cancel.
Wear a good pair of socks - most Buddhists take off their shoes before entering the mediation room. Don't wear 'loud' clothing which attracts peoples' attention.
Find out where the bathroom/toilet is and use it before meditating - it is not easy to meditate (or get to sleep) with a full bladder!
Do ask questions at appropriate times. Don't expect the group Teacher to gossip with you, they are busy people. Try to follow what the other people do, but do not worry or get embarrassed if you do things "wrong".
Offer to make a donation or take a gift with you (most Buddhist groups I have visited love chocolate biscuits!).