Sometimes management needs to be tactfully reminded that they have the power to correct these things, but they need to be made aware and it needs to be done tactfully. I can see how you regretted not speaking up in front of a majority who seemed to bless the bad behavior by indulging in it, but if it happens again you may want to speak to your supervisor in private.

We hired a new guy who needed some education from the management on how NOT to speak to female colleagues on the team. He was assigned to some projects with a female colleague of equal position and pay, and he spoke to and treated her like a subordinate although she was not. He was doing this unwittingly and meant no true harm, but it was very insulting. This was likely another case of a youngster who didn't have much experience working with women on a team. It was brought to the management and they spoke with this new guy and his behavior changed immediately, he's now much easier to work with all around and everyone is happy about it. But if no one spoke to the management about the behavior, it would have gone on unchecked and probably escalated.