Offered my spare room (my office) to a couple I don't know that well who are in Edinburgh to see fringe shows. They are out drinking and seeing shows all day and most of the night and didn't pay for me to attend any shows with them or take me out for dinner or even bring me a bottle of wine. I get that they are here to network but they both have jobs and I saved them over £500 in accommodation costs. Last night they polished off a bottle of really good gin when they came in pissed. I feel they are treating my place like an airbnb and not treating me like a friend. I just asked them to replace the alcohol they drank because I don't see why I should subsidise them. I can tell by their body language that they are deeply insulted that I asked them to do this. AITA for expecting a gift and telling them to replace expensive booze?