For their feasts, Mithraic initiates reclined on stone benches arranged along the longer sides of the Mithraeum – typically there might be room for 15 to 30 diners, but very rarely many more than 40 men.  Counterpart dining rooms, or triclinia , were to be found above ground in the precincts of almost any temple or religious sanctuary in the Roman empire, and such rooms were commonly used for their regular feasts by Roman 'clubs', or collegia . Mithraic feasts probably performed a very similar function for Mithraists as the collegia did for those entitled to join them; indeed, since qualification for Roman collegia tended to be restricted to particular families, localities or traditional trades, Mithraism may have functioned in part as providing clubs for the unclubbed.  However, the size of the Mithraeum is not necessarily an indication of the size of the congregation. 
Dr. Sophie Botte is currently Associate Professor of HRM and OB, and Director of Executive Specialized Masters at SKEMA. From 2010 to 2015, she was Director of Faculty Development at SKEMA. She teaches Strategic HRM and OB, with a special interest in Executive Education. Her fields of expertise are organizational design and organizational analysis (with a special interest in stress and well-being at work).
She holds a doctorate in Human Resource Economics from Lille University, and is graduate from Science Po Lille. She was Director of the Specialized Master in Strategic Human Resource Management and Head of the Management Department.