added a blacklist meetup group
added a blacklist meetup group

fredericksilva/webuild,mbrochh/webuild,webuildsg/webuild,mbrochh/webuild,webuildorg/webuild-repos,webuildsg/webuild,webuildsg/webuild,webuildorg/webuild-events,fredericksilva/webuild,fredericksilva/webuild,mbrochh/webuild