OpenDev assists a large number of channels on the OFTC IRC network for various communities' communications. You can learn more about IRC in the OpenStack Contributor Guide.
Some popular channels are:
OpenDev logs many IRC channels. You can find those channels and their logs here:
Links to specific meeting logs can be found on meeting descriptions below.
The IRC meetings schedule is driven by the opendev/irc-meetings repository. To propose a change, please submit a change to that repository in Gerrit.
Here is the link to an ICS file containing all scheduled IRC meetings, for use in your favorite calendaring app: