I agree with Sumin -- sometimes the experience weighs more than the contacts. Not that the contacts don't help, but the experience will carry more on your resume.
I would also recommend volunteering with nonprofits for fundraising events. A lot of nonprofits run on steam, and the event staff could use all the help they can get on event day, especially if you know/want to be in events. I did 6 years in nonprofit event planning/fundraising, and we used to call in volunteers to help us prep with some of our decorations, putting together kits for our team kick offs for the walks, and day of, we appreciated all the help we could get!!!! It gives you a great look into what goes into the events as well.
If you can, I would join some of the professional event planning organizations as well. I joined MPI while I was in college, and it gave me a lot of good resources, and even sent information about local networking events. If you have anything in your school that does the event planning, that's another good way to get experience. Most likely, your teachers will have contacts as well, so that gives you a good foundation for your contacts. To this day, I still talk to my professors, and they let me know when a job comes up that may suit me.
Good luck and have fun!!! Event planning may not be glamorous all the time, but it's definitely something that is rewarding (especially when you see your event come together at the end :-)).