What happens when men enter women’s feminist spaces? Dale Spender did an experiment to find out, and published the results in Man Made Language:

Present at the discussion, which was a workshop on sexism and education in London, were thirty-two women and five men. Apart from the fact that the tape revealed that the men talked for over 50 per cent of the time, it also revealed that what the men wanted to talk about – and the way in which they wanted to talk – was given precedence.

[…]

There is no doubt in my mind that in this context at least (and I do not think it was an atypical one) it was the five males and not the thirty-two females who were defining the parameters of the talk. I suspect that neither the women nor the men were conscious of this. There was no overt hostility displayed towards the females who ‘strayed from the point’, but considerable pressure was applied by the males – and accepted without comment from the females – to confine the discussion to the male definition of the topic.