This sounds exactly like 8 1/2
I've only seen one Truffaut film so far {Shoot the Piano Player} and I loved it. I IMDB'd this movie because I heard great stuff about it and I'll defintely see it, but based on the IMDb provided plot, it sounds a lot like Fellini's 8 1/2, which I hated :P Are there major similarities?
Some party, the beer's warm, the women are cold, and I'm hot under the collar
-Groucho Marx