Looks to be one of the larger WordPress meetup around town. Meetup claims they have 1,100+ members. See their Meetup Page. They're meeting at IgniteHQ on Waddell St. in Marietta. Their description on Meetup is somewhat generic:

We're a group of local WordPress users who get together to share our knowledge and experience, and to meet other WordPress users in the area. This WordPress Meetup is open to all who are eager to learn more about WordPress --- the software, the community, and the business!

They seem to have a good mix of technical and non-technical programs.

Events - Marietta WordPress Meetup

Events - Marietta WordPress Meetup
  • Marietta WordPress Meetup

    We’re a group of local WordPress developers, designers, and publishers who get together to share our knowledge and experience, and to meet other WordPress users in the area. This WordPress Meetup is open to all who love WordPress — join us!

    Learn more about WordPress Meetups at https://make.wordpres...

    IMPORTANT: DON'T GET TOWED
    The building next door to Ignite HQ is under new management. They will tow anyone that parks on their side. If there aren't any spots left, there is a public lot for $5 a block away at the intersection of Waddell and Anderson.

    You're welcome to bring your lunch!

    Marietta, GA 30060 - USA

    Tuesday, November 13 at 11:30 AM

    1

    https://www.meetup.com/wpatlanta/events/hlddlpyxpbrb/

  • Marietta WordPress Meetup

    Come join us for a collaborative session of helping one another with WordPress related issues using the 'Ask Me Anything' style: You talk about the problem and we try to give you guidance or point you in the right direction. Come prepared with some questions and get to know the other people in our WordPress community.

    If you have problems, bring them and we will do our best to help you through them. If you have skills, this is a great opportunity to help others. Or even if you just want to come and learn something new, we can help with that as well.

    All skill levels are welcome.

    We’re a group of local WordPress developers, designers, and publishers who get together to share our knowledge and experience, and to meet other WordPress users in the area. This WordPress Meetup is open to all who love WordPress — join us!

    Learn more about WordPress Meetups at https://make.wordpres...

    IMPORTANT: DON'T GET TOWED
    The building next door to Ignite HQ is under new management. They will tow anyone that parks on their side. If there aren't any spots left, there is a public lot for $5 a block away at the intersection of Waddell and Anderson.

    You're welcome to bring your lunch!

    Marietta 30060 - USA

    Tuesday, December 11 at 11:30 AM

    1

    https://www.meetup.com/wpatlanta/events/255439751/

  • Marietta WordPress Meetup

    We’re a group of local WordPress developers, designers, and publishers who get together to share our knowledge and experience, and to meet other WordPress users in the area. This WordPress Meetup is open to all who love WordPress — join us!

    Learn more about WordPress Meetups at https://make.wordpres...

    IMPORTANT: DON'T GET TOWED
    The building next door to Ignite HQ is under new management. They will tow anyone that parks on their side. If there aren't any spots left, there is a public lot for $5 a block away at the intersection of Waddell and Anderson.

    You're welcome to bring your lunch!

    Marietta, GA 30060 - USA

    Tuesday, January 8 at 11:30 AM

    1

    https://www.meetup.com/wpatlanta/events/hlddlpyzcblb/