Well we saw Mane-iac do a joke at one point in the episode about the "mane" event.

I haven't been able to think of mane jokes aside from maybe stuff involving food, so I was curious if any of you can think of any?

"the mane thing" comes to mind.

"manetenance" or "manetaining" is another.

"maneia" could work too. Basically anything involving the word main changed to mane is probably a acceptable pun.

There's probably something else, but I can't think of a whole lot right now.