Six days.

[Firis]

Spent six nights at a friends house, twas epic.

 

[Tsuyu]

My 360 is at a friend's house because my TV is bust-o.

I practically live there now.

 

[cheezMcNASTY]

my current record is 2+1/2 months.

 

[Arseface]

Been there bruv. Me and my best mate have a thing that started back when we was wee ones, where whenever we can, we spend about a week at each other's (usually mine's) house. Many great times have been had.

 

[HobbeBrain]

Hmm, two nights running is my record. It's not the best but the times we spent there totally were.... we invited this other guy round and had a gay orgy ended drawing a massive cock on his chest while he was asleep, good times.