It's always enlightening how many new posters turn up on threads to tell women they shouldn't have boundaries. Their names are always interesting too. Having friends since childhood is not 'breaking boundaries'. Setting the expectation that you are not allowed friends is bizarre.
In real life I cannot think of one woman I know who would be ok with this REALLY? I can't think of a single woman I know who would bat an eyelid. Two of my closest friends are men - one, I was actually friends with the wife first and she is my best friend, but he and I regularly go places just the two of us. The other, I like his fiancee but we don't really know each other that well - HE is my friend, not her. She's fine with it. Never occured to her not to be. One of her own best friends is a man.
If they're uncomfortable with close friendships with the opposite sex then you should ensure that how you conduct your platonic opposite sex friendships doesn't impact your relationship. If the person I was in a relationship with wouldn't let me be friends with 50% of the population I'd leave them.
But no you should not be going on cinema dates with a married man. Nobody has clarified (that I've seen) what the protocol is for gay/bi/lesbian people here. Someone help, I'm having a bisexual panic. Should I never go to the cinema with my friends? What if they're not married? What about before they're married, is it okay then?
I wouldn’t go to the cinema with another woman’s husband. Again, what about a man's wife? What about another woman's boyfriend? What about if it's your dad? What part of the marriage vows say 'forsaking all others, never to be alone with another adult of the gender I am attracted to again lest I fall prey to lust'?
This is, genuinely, one of the most depressing threads I've ever seen on here. So, so so many people who do not trust their partners - in some cases, because of past trauma - which is understandable - but in many, many many of them, just people who fundamentally don't believe you should have friends of the same gender as your partner and would be perfectly comfortable to enforce that in their own relationships. Which leads me back to the question of what everyone thinks non-straight people do? Also, cuts you off from half the population for potential friends...