I have zero desire to see two men getting it on.  Seen it and was not aroused.
I do not find bi men appealing and no I would not date one.  
In the two man/one woman scenario the men could be totally hetero.  And I find this as appealing as being with one man and another woman or three.
*yawn*
Multiple partners at a time just doesn't do it for me.
Been there, done that and just not my thing.  And no, I do not get aroused by watching others having sex (I mean in real life).  Been to sex clubs and it was odd to say the least.  I was not remotely aroused.