It is different if you are invited to a party,and it also depends on what kind of party it is.Many parties these days are "bring a bottle"parties. Unless your host is very rich then a bottle of wine is always welcome if it is a big party of say 30 or more people.Ask whether or not you should bring a bottle when you are invited if you aren't sure.Say something like,“Can I bring a bottle?” It is different if you are invited to a party, and it also depends on what kind of party it is. Many parties these days are “bring a bottle” parties. Unless your host is very rich then a bottle of wine is always welcome if it is a big party of say 30 or more people. Ask whether or not you should bring a bottle when you are invited if you aren't sure. Say something like, “Can I bring a bottle?