I've reached out to a few of the core participants from back in the day, and also the Boulder Linux User's Group organizer, and it's not looking like it's currently active.
However: I'd encourage you, and even help you, with getting one set up again. It's Reeeeal easy. The Boulder one was largely attendees from the Boulder Linux Users Group, and it was on the same day of the week as the BLUG meeting, just the remaining Thursdays of the month. We'd just pick a coffee shop that was open suitably late and had reasonable seating, and then announced it at the BLUG meetings and also on the mailing list. The BLUG mailing list seems to be defunct, but I can probably get someone to announce it at the meeting if you're interested.
I do have an ex attendee that moved to north Longmont and was interested in something in that area, if that's a geography you're interested in.
However: I'd encourage you, and even help you, with getting one set up again. It's Reeeeal easy. The Boulder one was largely attendees from the Boulder Linux Users Group, and it was on the same day of the week as the BLUG meeting, just the remaining Thursdays of the month. We'd just pick a coffee shop that was open suitably late and had reasonable seating, and then announced it at the BLUG meetings and also on the mailing list. The BLUG mailing list seems to be defunct, but I can probably get someone to announce it at the meeting if you're interested.
I do have an ex attendee that moved to north Longmont and was interested in something in that area, if that's a geography you're interested in.