Just have optional office hours, Slack huddles and mob sessions every few days.
Some of my engineers…
- have a open huddle for a few hours a day where anyone can drop into their project while they work
- others make use of our scheduled themed mob sessions (ie. Maintenance Mondays, deployment Thursdays). have a problem, idea or just want to hangout then come by?
- ICs & seniors are required to host at least a weekly office hour to assist juniors or teach something of their choice.
The default doesn’t always have to be return to office for a physical meet.
There’s lots of other options.