We have a "hybrid" office schedule, which I vaguely dislike and do not think is valuable, especially since my entire team is in a different time zone and I'm in a satellite office.
I was in the office the other week, and someone from the operations side of the project I work on started chatting me up about a recent company initiative to come up with projects to improve things, and asked my opinion about his suggestion. It was great info I didn't otherwise have and I got excited about solving his specific complaint in a productive way in the new system.
Except.... This was a companywide initiative. Why didn't the company have people present to all engineers instead of just submitting a powerpoint deck to leadership if they wanted collaboration on such an initiative? What if I was sick that day, would he have never talked to me about it and I never would have learned about this sticking point?
I'm available through email and Teams. Why didn't he message me? I message random coworkers all the time about feedback and ideas and brainstorming and questions, why didn't he?
Some people have no willingness or ability to communicate usefully digitally it seems, and they want to make my life worse to counteract that fact, but that's stupid! Just have a teams channel for water cooler talk! We used to have an extremely productive teams channel meant for devs to just bring up brainstorming and ask for feedback and wonder aloud and it resulted in all the supposed benefits that water cooler talk has, and it didn't waste my lunch hour!
Just talk to me! You don't need the excuse of physical presence! If the serendipity is utterly necessary (it really really really shouldn't be FFS), build a quick teams bot that just puts a few people in a chat room together occasionally!