Before I left we met semi-regularly, usually on weekends when we were all at home. Since we all had different schedules, we found we just had to adapt our meeting times to people's needs. At one point, I was commuting to work, and I as I would often leave by 6 or 7am, it ruled out the possibility of an early morning meeting. And Pete usually got home late most weeknights, which made evening meetings difficult.
We used to meet every week on Wednesday mornings, at 7 am. You might say, "Man, that's an awful hour to wake up for a collective meeting." Well, I have to say, the thought has never crossed our minds. We were single-mindedly dedicated to making this "the best collective in the San Francisco Mission District."
Actually, we used to meet in the evenings, but since there was no pressure to end the meeting--no one had anywhere to go at 10pm on Thursdays--the meetings dragged on and on. This behavior is endemic to low-scale collective groups, and usually is their bane. Realizing that, we moved to the weekend. But people wanted flexibility with their time on the weekends; no one knew where they'd be Saturday night or Sunday morning.
We then moved it to mornings. Mornings were good because, first, I had to be quick about it because I had to work, and second, nobody wanted to talk on and on at 7am. It was still considered a little bit of a hardship, and during the winter holidays we skipped a week or two with joy.
Later, we aimed for weekend nights when we're all at home. Our commitment was still firm, even if our schedules weren't.
Before I left, in my last year at the collective, regular meetings dropped off and we only met every couple of months, or when there was a crisis. I think by that point we had established a close communication, though, so we were always talking about current problems, interests, and so on, which obviated the need for an actual separate meeting.