Would you let little brothers join the sleepover?

My oldest son is having a couple of friends and his cousins over to spend the night to celebrate his birthday. My two younger sons really want to sleep downstairs where all the fun will be. My oldest son would rather they slept in their own beds. I am inclined to let them stay downstairs and celebrate. Yet I’m inclined to have them sleep in their own beds to make the celebration extra special for big brother – one event he isn’t forced to share with his younger brothers. What would you do?

I would really like to hear from some of our younger Flutherites who might have faced a similar situation with their own siblings more recently than I have.