VeritasPrepMike
Just a note on the comment about doubling your network. That is true, you can create a larger network, but I'm not sure it will be an effective one. I'd rather have a smaller network, that I have deep relationships in, versus a big one where someone says, "oh yeah, I think I remember you from that one class we had together." It's like people on linkedin that have thousands of connections, but none of them can get you a job. What's the point?
Mike, I understand your point, and I think to a good extent it is a valid one, but I am going to respectfully disagree. For the following reasons:
1) Oftentimes, in networking, we actually get the most opportunities and open doors from our weak ties. Why? Because we are usually already familiar with the network of those we have deep relationships with, while those weak ties are oftentimes connected to many people and organizations beyond our reach. Hence, it helps to double your network coverage, even if some of that is going to be "weak ties".
2) Related to point 1, unless you are 100% focused on settling in 1 particular geography and job/function for the rest of your life, you will need a broad network, with good geographical and industry/functional coverage. Don't just hang around the same clique of people at school. Don't judge your investment in relationships based exclusively on who you think at the time will help you land that job offer.
3) Sometimes, you can develop stronger post-MBA relationships with "weak tie" acquaintances at school. For example, after business school, I spent a year and half in the East Coast, and became closer with quite a few former classmates who I got along but was not very close with during my MBA. It could not have happened if I had no acquaintance with these classmates beforehand. This is especially relevant if you end up taking a job offer abroad and the alumni in the area are weak ties during school.
4) Having a large network coverage does not conflict with developing strong relationships with some classmates - these are not necessarily mutually exclusive. You can develop strong relationships with certain classmates while still being able to High Five a broad range of classmates.
5) You probably wrote in your essay that you are looking to broaden your experiences by meeting new and interesting people - do that!
6) It's great to have a place to crash in when you need to book a travel ticket to country X.