I definitely agree - I've been to a few get-togethers where it was fairly obvious that a first-timer was looking to hook up - not a comfortable situation. Best not to go to a get-together with that motive.
However, if you are looking to get to know poly folk, maybe make friends with them, and see whether there is any chemistry there in a low pressure situation, they are fantastic. Worst case you will get to know some new folks, right?
I met one of my current partners at a poly gathering and neither of us had any intention of finding someone... that was over four years ago...
Please check out The Birdcage - an open, friendly Polyamory forum for all parts of New York State
"Listen, or your tongue will make you deaf." - Native American Proverb