>>22179912>Go to cons with tons of merch from your favorite shows and games>See randoms also wearing mechSay "Hey. My name is Anon. I love your [Pin/shirt/cosplay/plushie] you have great taste. Later"
Then walk away.
Keep repeating until someone says "Hey! Wait up. I like your [T-shirt/pin/favorite show] also.
Practice this speech in the mirror until youre comfortable enough to deploy it at cons. Talk to people of all shapes and sizes. You don't know who will be sociable or not.