I've allowed my partner to refer to me as girlfriend to make discussion with others easier.

That's pretty understandable and reasonable, but something tells me bringing another girlfriend to the same party would probably make the whole point a little moot.

Something about the post reads as "I'm only poly to upset my parents", and that's not typically what I see when interacting with the community. All the successful poly relationships I've seen have taken a ton of work and communication for it to function, and tend to be more mature than let's go upset my partners parents.