In areas where men are the minority, there are spaces that cater to men.

For example, we have parent-child meetups here. Since it is almost exclusively mothers who show up (despite being open to all parents), they at some point introduced an extra meetup for fathers. This gives men an opportunity to take part in something with their kid where they aren't the only man in the room.

X-only spaces make sense when X is marginalized or a minority. If you start a kindergarten teacher group for men, noone is going to complain.