The best would be via voice chat, a lot of the witnesses are scattered around the world, it would be a challenge to gather them in a physical location. The community holds numerous weekly chats on Discord, so you're welcome anytime to join us to discuss important matters.
Maybe a voice chat dApp on the Steem blockchain would be better than Discord. The conversations may be streamed and/or stored on the blockchain, so the users would be able to hear them to have more insight and knowledge about the happenings around Steemit and around the Steem blockchain.
These meetings are posted by aggroed after they happen, stored on the blockchain. Isn't that good enough for you?
I only gave an idea. I did not even know that the meetings are posted by anyone on the Steem blockchain.