Once a month was the closest option. If I REMEMBER, it's once a month, otherwise I could easily go 2-4 months without EVER checking it.
I'm wondering if there's a better way to implement something like this. I know it just used to be done in EE, which sometimes kept a large meetup thread like DFW or whichever one Markrvp went to at the top and bumps off topics. At least I still saw meetup threads though. Like you, I often come late to the party to find out "Oh crap, I just missed a meetup opportunity a week or two ago".
I'm guess I'm kinda wishing meetups were posted in EE again.