Trying to be vague if I can, so please excuse any missing info!
Started a new job last year and absolutely loving it. I work in an off-shoot branch of a massive institution, where it's all very chilled out and relaxed (but we still work hard!) I am mid twenties, like most of our staff (bar the managers and some higher ups) and we all get on really, really well. My team works the closest with one other specific team, who are a bit younger (early to mid twenties). Since we're the same age and we work together the most, we've had parties, nights out, and dinners together. I saw no issue with this, though did always query why my manager didn't want to go but thought nothing of it, they're a parent and a commuter so appreciate nights out might not be their cup of tea. I'd really hate for them to feel left out or jealous, and I don't necessarily think this is the case because we do invite them every single time.
In a recent 1-1 we got chatting about my plans for an upcoming weekend, and when I mentioned I'd be going out with the other team, they cut the meeting short and asked me back into the office. They then had a sit down with our team and expressed concern over professional boundaries, appropriate behaviour etc. They have explicitly said that they do not think we should interact the way we do with the other team outside of work. Other members of my team were not happy with this, and said as much.
I see our manager's point; there have been occasions where drunken snogs, a barmy outside the kebab shop at 2am etc has come up at work, though it's always been laughed off and all is forgiven. If something more serious did happen, there is the potential that it would affect two teams rather than one.
There is also the issue of one of my colleagues being so infatuated with a member of the other team that HR actually had to get involved, though seemingly they are behaving in a more restrained, appropriate way now (hard to tell, I don't speak to them as much) - I see why my manager would be keen to avoid a repeat of this, but the blanket punishment method didn't work in primary school, and surely doesn't work now we are adults? Unsure how to unpick this finer detail in all honesty, as I do recognise it is a problem.
However, I also see my own side (obviously) and that of the other team, who were told the same thing by my manager, though not their own. They/we are of the opinion that what goes on outside of work hours is, within reason, our own business and cannot be dictated by managers, higher ups etc. I had a quick chat with HR whilst popping past, and they have largely echoed our thoughts, that our manager cannot decide who we do or do not spend time with outside of work.
Our manager has now doubled down, and whenever they spot us chatting to members of the other team outside of a meeting or when we have something else to do they ask us to return to our office. We can't even have lunch together anymore.
Feels sooooo petty and dramatic and like we're back at secondary school being separated from our friends, and I'm almost embarrassed to even bring it up with them at this point because we're working professionals, not children, but it is affecting both how we feel being essentially sequestered in our office at all hours of the day, but also how our team feels about our manager, who ordinarily is very relaxed and we love them. We're (my team+manager) going to a residential event in a few weeks with the other team and have been deliberately sat separately, our hotel rooms are floors apart, and our manager has asked us out for a drink in the evening (just to cover all angles!) so it appears really clear that communicating outside of work is a no-no now.
WWYD? AIBU to ask HR to have a word ahead of the event?