I have many friends who are branching out into the world photography and know many others who do this kind of work. From time to time they want work/permission to do club parties.
how much is good enough without insulting? what is the going price for a photographer at your event.
figure either a regular party 10pm - 4am or an outdoor event for 3 hours.
What else is expected with the price? negatives, data files, exposure to the various rags??