Parties are either public or private.

Public are a anyone-can-walk-in-and-join-in party and private are invite only.

Many people have concerns about running into someone they know. If this is a mortifying idea for you then I recommend going to a party outside or your area. Of course, they could be thinking the same thing.

Munches are social events which usually don't involve play. Some of them may have light, keep-your-clothes-mostly-on and no-sex play. They are best for people who want to get to know other kinky people, introduce yourself, and become familiar with others in your community and the goings-on in your area. It can help if you want to attend a particular party that requires vetting. Someone who attends the munch may know the person running the party and may vouch for you.

I have a lot of experience with play parties, both public and private. I offer clients the option for me to introduce them to both types, as people are often intimidated by them, and the idea of playing publicly, and it helps to go with someone who can guide and support you.