There is variety in the protocols of munches so find out what the one you are looking at does. Some are strictly invite only (but these you won't even find out about unless you are 'one of the in crowd' in your local scene) and others are more open and love to see newcomers. Yahoo groups have mailing lists for many local munches where they discuss times and places. Many of them are also timed to match with big fetish events like the London Fetish Fair and the Birmingham Bizarre Bazaar.

The majority are strict on clothing and behaviour. No fetish clothes at all and behave politely. Even if you normally wear fetish clothes in day to day wear I'd suggest you toned it down a little for the munch as many of them are dependent on being allowed to use back rooms of pubs and restaurants and overt fetish behaviour can upset the owners.

Most of them will have a greeter who will agree to meet you before hand and introduce you to everyone. If they don't have this they also often have an obvious sign of where they are.Sometimes this is as obvious as a sign with an arrow pointing to the room. Other times it is a subtle sign (a particular book on the table, for example) so that members know where they are but outsiders do not.