Enter Air now has one 737 operating out of Paris-Roissy/Charles de Gaulle airport, flying (mostly to the Canary Islands) on behalf of French tour operators. It joins Small Planet Airlines, who also base a 737-300 and a A320 at the main Paris airport:
enter air : Départ immédiat
For the benefit of non-French speakers, the article mentions that French charter airlines are not amused by such competition on their home turf, SPA for instance offering the same level of service for 20% less cost. Air Mediterranee's CEO even questions their right to (temporarily) base aircraft and crews in France... but conveniently forgets to mention that the airline he heads recently delocalized part of its fleet (and crews) to Greece! Talk about double standards...
Cheers