I'm given to understand by a Council employee who is a friend ( I could be wrong) that this event would have needed a special entertainment and alcohol licence from the Council which has to be applied for every year by the organisers of the Cookout. This might be another way in which to register protest ie by objecting to a reissue of the licence assuming that there are indeed grounds within the licencing act to do so.
I also actually wonder how satisfied some of the people were who seemed to be driving around the streets for hours trying to find somewhere to park- perhaps they would also prefer a larger and more convenient venue!
Some friends of mine also enquired about the conservatory for a wedding reception for their daughter and were quoted similar prices for a reasonable number of guests- extortionate. The Horniman appear to have delegated everything to Suzanne James Ltd who are retained to provide all services. They were hoping to provide their own catering but it came as a package so no choice ther.
They were long standing residents of Forest Hill and supporters of the museum who felt that some discount could have been given to local people at least to the extent that the prices charged were fair and competitive. I think its time the Horniman realised how important community support is as despite their international and national status, I am sure that the majority of their business still comes from local people- I know many people who are up there several times a week with their kids spending money in the museum shop and cafe and for many local childminders it is a home from home.