Good suggestions actually. France seems a bit crap. Still had a good time though and have found a nice place called honfleur for tonight. 
honfleur is a really lovely place, well, it was last time i was there in the 90's! used to love the shrimps they sell in the market.
France has never been to me the party capital of Europe... but its great for chilling out and enjoying the scenery and food
you could try Le Touquet on your way back up.. thats quite a big seaside town where all the Parisiens go.
alternatively there is Montreuil which is quite a nice market town on top of a hill (but again pretty quiet)