OK. I accept I am a bit of a coffee snob. I don't drink that much of it but do enjoy a cup in the morning and after meals. I only like proper ground coffee and really can't stomach instant.
So, here is the dilemma. We are visiting someone over Christmas for 5 days. They only have instant coffee. They are fantastic hosts. The food, wine etc. is always lovely (and more importantly, they are generally great company). I do miss a decent cup of coffee though 
WIBU to take along our cafetiere and some ground coffee to use whilst we are there or would that be really offensive ?