A great place to meet fellow travelers at Ben Gurion Airport is the Aroma Espresso Bar. The Aroma kiosk is located to the right as one enters the arrival hall after passing customs. Once you pass customs and pass through the sliding glass doors, look to the right. The photo below will help you recognize the Aroma Espresso Bar.
Behind Aroma are tables that make a convenient meeting place, and they are adjacent to the restrooms. Tour groups will exit the building in that area as they make their way to their buses.