The official Steemit Chat is still steemit.chat. This is what is mentioned in the Steemit-FAQ and you will find a lot of serious channels. Additionally the community has created a huge number of Discord-Serves with a lot of community managed channels. As I am thinking that Discord is giving you a much more enhanced user experience and you will maybe find there a channel that suits your needs most, I will try to give you a short list of Discord-Channels known by me.
Discord Server List
Peace, Abundance, Liberty
https://discord.gg/a9kWWR
The Discord of the Minnow Support Project
Looking For Niche
https://discord.gg/8JFFuR
WhaleShares
https://discord.gg/rWzRv6
Steemit Talk
https://discord.gg/wR28fG
MinnowsUnite
https://discord.gg/4rZmRt
SteemBnB
https://discord.gg/DgJCKh
Steemit D-A-CH
https://discord.gg/ssDKUN
German speaking community of steemians from Germany, Austria and Switzerland.
These are only the ones I am currently aware of. I am sure there are much more interesting opportunities out there. Just look around and discover ! On my behalf I will add discovered channels to this list from time to time.