Just had in laws to stay for the week and they will NOT help themselves to anything ie tea and coffee/snacks etc. This is OK if they're here for the day at a weekend and DH is around to help but during the week when he's at work I don't have time with two young DC to wait on them! I have emphasised SO MUCH and so has DH that they are totally welcome in our home and to please help themselves to absolutely anything they want/need. They don't. They sit on the sofa waiting to be offered things/have their day micromanaged.
The absolute polar opposite to my family and hard to deal with for me as feel like I have four people to take care of all day instead of two. DH says to just let them get on with it but it's so awkward.
I am very family oriented and really want them to feel welcome and at home. To me having to wait to be asked if you'd like a tea or a coffee and not to feel able to pop out to the shop to buy a paper or whatever without asking must be so tiresome for them.