Okay I have probably disappointed a few clients who have bought me a bottle of wine, when I have thanked them for it and left it in the kitchen unopened lol. You see, most of them drive and I would not encourage anyone to drink and drive (I guess I can't say break the law any more). If anyone died, because I willfully participated in encouraging a driver to drink I could not forgive myself. However... if a client has told me he is on foot, or taking public transport, then I will share the drink they bring with them (maybe just a small glass for me).
You are right with the soft drinks though. I do offer those and usually go get it while the client is having his compulsory shower and it's there waiting for him on the bedside table for when he needs to get his energy back