“This group is dedicated to providing a harassment-free event experience for everyone, regardless of gender, gender identity and expression, age, sexual orientation, disability, physical appearance, body size, race, ethnicity, or religion (or lack thereof).

We do not tolerate harassment of group participants in any form. Sexual language and imagery is not appropriate for any meetup venue, including talks, workshops, parties, Twitter and other online media. Group participants violating these rules may be sanctioned or expelled from the group (without a refund if applicable) at the discretion of the group organisers.”

The long version is at confcodeofconduct.com which is also the source for the above.