We've started planning our budget and we've allotted money towards an open bar. However, my family unfortunately has a very long history with alcoholism. Because of their inability to know when enough is enough, I've thought about making it a cash bar past a certain point in the night to deter bad behavior. FH has suggested a two drink minimum which sounds even worse to me. Either way, it feels like punishing guests who can handle their alcohol to make up for the ones who can't. It's also not the thing we can have a rational discussion about and their presence means so much to me. Thoughts?