<human>: Reason for asking:  
  
An old friend requested I be his best man for his relatively small wedding this upcoming fall. The only other time I was asked to participate in a wedding was on the pretense that I play music during the cerimony at no expense of my own, of course.  
  
For the current wedding in question, it's been asked that I split the bill for a seemingly extravagant night out on the town for the groom-to-be, as well as myself and a handful of his friends and family whom I have never met or known of. They have also alluded to the idea that I pitch in for the bill on a fifteen man, nine hole excursion at a secluded golf resort for the male guests.  
  
The couple in question have never been big communicators. We would all get together about twice a month when they were in the casual dating mode. Now that things have gotten serious, and the fiance has taken a sudden and extreme religious turn, we have talked less and less.  
  
Up until this past weekend, there had been no communication between us for four months. Now I'm not exactly sure what to do. Having already agreed to best man which, make no mistake, I'm honored to do, I'm a little worried about the potential cost to me, or the consequences of having to back out of this agreement.

Can you condense the text into three sentences or less?
<bot>: What portions of a weddings events/invoice is a typical best man in a typical wedding expected to be responsible for?