You can use the Meetup logo to promote an event or group, so long as you:
Include the name of your group along with the Meetup logo.
Do not use a Meetup logo in connection with any of the actions prohibited by the Meetup's Terms of Service.
Do not use a Meetup logo in a way that may imply a false relationship with or endorsement by Meetup.
We’re all about creativity, but if you wish to use a variation or “mash-up” of a Meetup logo to promote an event or group, please also:
Include the name of your group along with the Meetup logo variation
Do not alter the color or height/width proportions of a Meetup logo
Do not use a variation of “Meetup” (e.g., “meet up,” “meet-up,” “metup,” etc.)
Please note that organizers and members using a Meetup Logo or variation must comply with Meetup’s Terms of Service.