I don't have a weekender but know a few people who do...
One has an e30 M3 that probably gets used for 6 weekends of the year although it's more of an appreciating asset, it's on an F plate, owned from new and has very low mileage.
Another has a late J plate Sierra 4x4 Cosworth which is used an awful lot.
An old workmate of mine has a v12 Jag XJS which seems to never move (although it's in superb condition, taxed & insured)
Finally, a mate who has an F10 520d company car yet uses his "toy" - a 58 plate e60 M5 - more than the company car it seems, he seems to be the opposite and use the f10 at weekends to ferry the mrs & kids about and uses the e60 for his daily commute, he's lucky, he can use his company fuel card for either car it seems!
I'd personally like a weekend toy, whatever it may be, but would find it hard to justify the cost relative to use I'd guess...