Living Social has fantastic deals on goods, activities, classes, and vacations. I’ve had the best luck with purchasing admission to 5k fun runs, and VIP admissions to festivals and events to include open bar and buffets.
As far as purchasing goods from this site. I’m not a fan. Groupon is great because you buy the item directly through them. However, Living Social essentially has you purchase a coupon code, thus, you have to go to the vendors site, select the item that was promoted, go through a checkout on a totally new site, then enter the provided code. Groupon will save all of your card and address info for future purchases, and it takes only 2-3 clicks to confirm your purchase (which can be a good or very bad things, especially in my experience after a few glasses of wine.)