Group Work…
/begin rant
...is most often going to be bad at the undergrad level. Don't do it if given the chance. There is always just that one person who fails in the most epic of ways. Time and time again this has been shown to me. I know the value of teamwork. Don't ruin it by forcing me to work with those happy with a C-average and partying all night. Don't get me wrong; you can have a C-average as long as you have the drive and motivation to do better.
Teamwork in a healthcare professional setting is awesome. You don't have to worry about doctors slacking; they've gone through med school. Hard work is built into their core character and all those years of training are wasted if they slack and fail in their careers. And the interprofessionalism movement, anyone?
Other professional school students? Tuition is so high you don't mess around. Getting in is hard enough. Launching into the career in the real world and maintaining it is even harder.
I have experienced that the only time you have to put up with the hopelessly incompetent is at the undergrad level and below. The chance of you being grouped with a scrub is much higher cause there is just that many more undesirables. Above undergrad, the consequences for being a douche are much more dire and most of the scrubs have been weeded out.
I've carried all I could this year. Now, I'm going to try that much harder to not put myself in these situations. I can't make decisions for other people but I can decide what is best for myself. I'm sorry; I used to be lenient but the system has made me take on a Type A approach in group work now.
/end rant
Thankfully, I will no longer be working with undergrads in this setting. So this could very well be all moot. 
But remember people, they are out there. And they will bring you down in your pursuit of excellence (be it God, academics, or simply planning an event) just by being their sad complacent selves. Do your due diligence and avoid placing yourself in bad situations with a scrub.
4 days.