Why not take along a bottle you actually want to drink? You can always tuck it behind the toaster once you’ve poured yourself a glass
Often when we talk about party wine, the assumption is that the host buys it but, to be honest, I don’t know anyone who foots the entire booze bill. Pretty well every guest brings along a bottle, some better than others, so what’s the etiquette?
There are two ways of approaching this, I reckon, depending on how unscrupulous you are. The first is to regard it as an opportunity to offload a dodgy bottle that you’ve been given – quite possibly at a party – then make a beeline for someone else’s altogether superior offering. Which is fine so long as you remember not to give the host back a bottle they’d brought you.