I think perhaps we're approaching this in a rather, ahem, odd way.
Massive social change is unlikely to occur on trains or because of random conversations with strangers. I mean, there's never been a movement that I can think of that has focused attention on change via casual conversations. 
It's far more likely that male gender attitudes will be shaped by mothers, fathers, siblings, friends, school environments, partners, mores in pubs and clubs, organisational environments etc. It will take a concerted cultural effort across domains of family, education, leisure, commerce, politics childcare and just about every other area of society - including economics, of course - to effect meaningful change. It's unlikely to come as a lightbulb revelation moment, either - with mean leaping up from their seat, bashing into the buffet car as they cry "EUREKA I NOW UNDERSTAND EQUALITY" while tea and biscuits fly all over adjacent passengers - far more likely that we see a tectonic, gradual shift in mores and assumptions, with an old-fashioned rump of people who mutter incoherently about "PC gone mad" and "losing white male culture".
(I take some hope in #metoo and other such initiatives because they draw important lines in the sand. They're not sufficient on their own, but they send a message that behaviour that was once broadly tolerated - sadly - is now decried as unacceptable and disgusting).