Pros
You might meet a couple interesting people who are going through the same struggles as you by working for Groupon, so you might end up with a few new friends.
Cons
Certain departments are run by bratty kids that don't value hard work or how much overtime you put in. You are expected to be available at all times, including nights and weekends. They don't care how mistreated you will be by certain clients they do business with, or by the lack of breaks they give you during the day (eat your lunch super fast and limit how many times you use the restroom). There is no room for promotions even though they will keep adding on to your work at the same salary. Certain managers are incredibly rude and will yell and cuss at you for petty reasons. Starting salary is the lowest I have encountered in this industry and extra perks are only available if you work in the Chicago office. Office culture reminds me a lot of high school, full of cliques and bullies.