- Brandenburg Adler Old Boys Potsdam – Germany
- Old Boars – Germany
- Walferdange Rugby Club – Luxembourg
- Les ceps Beaujolais – France
- Abu Dhabi Old Boys RFC – UAE
- Malta Marauders – Malta (4th participation already)
- Kinsale RFC Wild Geese – Ireland
- RK ORB – Ukraine
- Dresden Hillbillies – Germany
- Alte Preussen – Germany
- Old Rugby Teramo – Italy
- Cinghial Old Rugby Como – Italy
- Old Boys Praha – CZE
- Říčany O33 – CZE
- Moravian Eagles – CZE
- Prague Boys – CZE
