This got marked as wrong: "The committee meeting is happening now, no?"
Should be right. You should report it.
Is "kunsido" always used in the sense of a formal meeting (business-related and such), or can it also be used for a more informal gathering of friends?
It's always formal/official.
An informal meeting is a kunveno.
Informal would be "ni sidas kune"
" Komitata " is ugly. Why not " Komita " ?
I'm not sure when or why "komitato" was adopted as the word for "committee" but it's been in use for at least a hundred years. And "komitata" is the adjectival form. Sorry.