Porch/Bar Sing-a-longs

To try to make the day on a happier note (god bless those who died earlier today) we have pretty much all been to a party where everyone was sitting on the porch and someone pulled out a guitar and everyone started to sing, or at a bar, or just hanging. What ere some songs that everyone always joined in on, at your campus, or whenever you go out?

Mr. Big- To Be With You (definately a porch tune)
Billy Joel- Piano Man
Don McClean- American Pie
Gloria Gaynor- I Will Survive
Raw Base- It Takes Two
Most Barenaked Ladies Songs