friends. Some have fun from both.
If your friend only has fun hanging out with friends and doesn't care about the game, it might be weird. Otherwise, they're good!
I have gone solo many times and gone with friends many times and I have a great deal of fun either way. When I'm by myself just watching the game even without any conversation or friends around me it is still fun. There is always a sea of BYU fans nearby which is awesome too.