The couple of get togethers that I have had a helping hand in went pretty well-but there are always"special"people that just have to be a little too "special"to be worthy of my giving a rat's ....

I remember one "special"person IM'ing me from outside the restaurant we were holding the do at-wanting me to come out and meet him
I have organized many internet group get togethers-and unless there are strong friendships formed at these things they just kinda fall apart.

I also belive in the saying" familiarity breeds contemp"t and that having too many get togethers with the same folks involved gets tiresome.

Also you really need a good mix of extroverts and introverts-too many of one or the other and the evening can end very quickly(or one wishes it would end more quickly)the guests do not all need to be a-listers,but the a- listers should not be a--h---s