So me and my friends have an issue with our legion launch party

So me and my friends have everything prepared for the legion launch at 3 a.m tonight. Just 1 problem. I have a 2x150 ft lan cable in my conference room and there are 4 computers. Does something exist where u can like multiply a lan cable? Sort of like an extension to a wall A/C plug? Is there anything else I can do or would I just have to find more 200 ft cables?