Keep in mind the majority of chat members are from the US and have jobs or school so the chat is most active at night (from about 7pm-2am Eastern Time). You're of course welcome anytime but that's the best timeframe to find an active chat.
Unlike the forum the chat is very casual and mainly off topic so if you don't have pixel art to discuss show us other art, talk about music, movies, games, sex change operations, pretty much anything.