C1 C2 C3 : them's 3 cabins !
6 guys, baptized A, B, C, D, E, F, rent the above 3 cabins: 2 guys per cabin.
D is not in C2
F is not in C3
B is not paired with C or E
C is not paired with A or D
F is not next door to B or C
Who's where?
Just the answer will do.
If you're brave and wanna supply the why's, go ahead!