SF Websites/Lists for Things to Do

So this was inspired by my Top 10 things to do list and @StephSF's latest reply about a site for plays in the Bay Area.
That got me to thinking and I think there are some great sites for SF people to subscribe to the newsletter/lists to find cool things to do in the city.

Here are some of my favorites:

http://www.bloomspot.com
http://www.groupon.com
http://www.goldstar.com
http://www.livingsocial.com
http://www.homerun.com
http://blackboardeats.com/san-francisco
http://www.eventful.com

Check them out and let me know if you have any to add. I feel a Top 10 list coming on.