Re: Plus one
^ Not at all. A friend of mine invited me to her daughter’s 4th b-day. I didn’t know anyone there, although mind you language wasn’t an issue - they all spoke English. I went, mingled for about 45 minutes, and then made an excuse and left.
One of the responsibilities of a host is to ensure that all of their guests are entertained. If you’re going solo, your host needs to make sure that they seat you with or introduce you to people you can mingle with. If they leave you to your own devices, then they’ve failed their duty as a host.