As a remote contractor I sometimes feel that it would be nice to have a chat like that, but a few startup-themed slack channels that I tried out turned out to be no good for me.
* "Where work happens" - https://slack.com/
* "Free Voice and Text Chat for Gamers" - https://discordapp.com/
The issue, and in my case, this is specific to the remote Slack, is that a lot of people who use it /already/ have Slack open for their day job.
Lots of people joined the Discord, but no one really chatted. When we moved to Slack it was like an instant adrenaline shot into the daily activity of the group.
Again, I think this is specific to the group — I’m in a couple crypto Discord channels that are SUPER active. It just happens that a lot of the remote workers in the group already have Slack open.