clientele - Even more classy than clients, but you can have one client, whereas clientele is a class of people rather than a few who can be counted, e.g. 'Three clients are waiting for you, part of your regular clientele.'
discotheque - dance place playing discs rather than having a live band, but many would have both
façade - misleading/false face or front, sometimes with nothing behind it, or nothing of the same style
raison d'être - reason for being / justification / purpose e.g. 'What is the raison d'être of this committee - to organise club meetings - or just have jolly lunches?'
Renaissance - rebirth (cultural)
