In the voice over which begins the film, Hughie(Billy Connolly), a roadie for the great 70's band Strange Fruit, said the reason lightning struck at a rock festival to stop Strange Fruit's set was that God was sick of 70's excess. Indeed, it's been popular to put down that era of music, and see punk as a welcome antidote to it. While I agree the excess was tiresome(as well as the misogynistic urges which came out of it), and like punk, I still am a fan of what is considered classic rock or glam rock, and this film about Strange Fruit's long, strange reunion is an affectionate tribute to those days.
One of the reasons the film works is the care of the people behind the scenes. Brian Gibson directed WHAT'S LOVE GOT TO DO WITH IT, about Tina Turner(while I had problems with the dramatic parts of the film, the music was handled very well), writers Dick Clement and Ian Le Frenais co-wrote THE COMMITMENTS and were behind the music-oriented British TV show OVER THE RAINBOW, and the songs Strange Fruit played were co-written by Foreigner's Mick Jones(not to be confused with The Clash's Mick Jones), so it was a meeting of people who knew what they were talking about. Also, two cast members are musicians in their own right(Bill Nye I don't know about, though the film credits him with his own singing, and he certainly looks like a lead singer of that era, while Jimmy Nail was in another British TV show which was music-oriented, though I forget the name, and he was in EVITA), and the others are convincing at it. And while, as I said, a lot of 70's bands like Strange Fruit behaved badly towards women, the movie doesn't make the same mistake(except for the woman who follows Timothy Spall around); as the manager of the reunion, Juliet Aubrey is quite good and plays a fully rounded character.
The other actors are all good as well, with special praise to Stephen Rea, who handles the more dramatic role well without sentimentality. There are a couple of plot points which don't work, but overall this is quite enjoyable. Oh yeah, and the music is good too.

I love Alec Guinness. And that's saying a lot after this film. Actually, he is not bad in it. He just seems to stand aside, be urbane and his usual delightful self, but invest nada. It is obvious the girl he is matched with is a featherweight, even as an inexperienced young French girl. Sir Alec wouldn't have chosen her when he was young and very obviously isn't too happy about it now.
The interesting character is the brooding brother of the odd "Suzanne", another twit. "Donald" aspires to be a French Heathcliffe and I waited in vain for the source of his mystery. What deep dark secret was he hiding behind that forehead? Was he in love with the father's mistress? Why did he jerk Suzanne's hair when she plotted to bring the disparate parts of this turkey together on the country estate? Or perhaps he had simply had enough of her obnoxious acting.
The film would have been charming with Guiness and the "older woman" reminiscing and seeing Paris together. THAT would have been a great story! Two lovely experienced people in a beautiful city after the destruction of World War II. Why didn't somebody come up with that? I suggest watching Alec Guiness in "The Card", a little known but worthwhile film.