maybe its a case of, the men THINK the women dont want them there, so they dont go.
maybe they need some words of encouragment, ie fromthe pricnipal if its a man, ie in the school PTO welcome brochure or first newsletter of the year, to specifically invite dads to come, let them know this is a NEW ERA and dads TOO are welcome at PTAs/PTOs....some just need a little push, or welcome, and if several come, they wont feel so out of place or overnumbered, and keep on coming.
maybe instead of cookies and cupcakes, offer popcorn or cheese/crackers instead at the meetings.
or do a survey, ask the men why DONT they attend, and what would it take for them to attend,,,,differnt time (evenign meeting instead of daytime) or day of week etc.
meet at a local pub instead of school, i dont know, get creative, theres got to be a way to get the men involved, after all they are HALF the parent population and need a say in matters. my guess is, they THINK the meetings are ladies affairs and or boring and or just not something that is 'cool'. so, ask them what it takes to make it more welcoming.
in our district, MEN are pres or VP of the PTO, so that is the best way to get dads to attend and KNOW its 'ok' to go. vote a few guys in at next election time!!