I am coming to Boulder for a few days this week (tue - thur). Are there any pools where I can drop in and swim? I’d like to avoid the “and we have to do a full tour of the facility” sort of situation. Also, are there any common meetup times/locations for group runs?
Boulder has several rec centers which are all open to the public for a daily fee - around $6 or $7 I think? North Boulder rec is closest to downtown. Check online for their pool schedule.
I’m not sure about group runs but I would call Boulder Running Co or Fleet Feet and ask them.
Enjoy your trip!
Stay at the Millenium.
They have a 25 yard, 5 or 6 lane pool.
Everyone around here swims with BAM (http://www.bamswimteam.org/w/Facilities.cfm?pagetitle=Pools), you can drop in and pay a fee and start swimming. The individual pools themselves may not all be open because of the season, it looks like Scott Carpenter is open (https://www-static.bouldercolorado.gov/docs/09Sept14-30_SBRC-1-201409151011.pdf) which is nice because it is a 50 meter pool. As far as a running group, I might check meetup.org or something, this is Boulder, people are running all the time!
There’s a new swim program that is a bit more structured and focused on improvement and individual goals - www.facebook.com/swimcoachgeoff. Practices are only three days/week right now but you can drop in. Amazing coach with great results!

Scott Carpenter 50M right in the middle of town. Very cool
Whatever you do don’t run on pavement. Too many good trails.