Multiple things can be done from the server, here's a list on what you can do:
Talk with people in General Chat
Use bots in Bot Commands
Post memes in Memes channel
Post gaming clips in Gaming channel
Participate in events in Events channel
Count to infinity in Counting channel
Answer polls in Would You Rather channel, Never Have I Ever channel and Polls channel
SMASH OR PASS
Post cool art in Art channel
Post anime news, edits, discussions in Anime channel
See real news in News channel
Answer interesting questions in Question of the Day channel
Spam random messages in Spam channel
and MORE
