Thanks. Anime Conventions happen almost the whole year in my country, because there are various groups who fund and organize them - Tv stations, manga groups, even university students organize conventions of their own. However, they are not widely advertised, so I depend on announcements at our facebook group and on my cosplayer friends if an event is near. Those organized by Ozine are my favorite, because they often have a real maid cafe (it's cute black and pink uniforms last time) where the maids offer to spoonfeed the customers. Not kidding. ",)
One fact. Some cosplayers only stay outside, this is espescially true for events where the entrance ticket is high priced. They don't go inside, they just want their pictures taken. Of course, I politely ask for permission first before taking someone's pic.