"The 'aha' moment was realizing she didn't have to be the one to organize events, members can organize events themselves. This happened when (Carri) stepped away from her computer to do some household jobs, and when she returned, she discovered the members of the Facebook group had already planned the first event," Newenham told CNBC Make It via email.
Since GirlCrew was founded in Dublin during 2014, the social platform has branched out to locations all over the world, including San Francisco, Edinburgh and Melbourne.
It now has over 100,000 members in some 46 cities, and has collaborated with the likes of Facebook and represented the European Union at SXSW Interactive Festival, which is part of South by Southwest, in Austin, Texas.