Has anyone got any good ideas for a hen night please?

Hi all I'm trying to arrange my hen night but am struggling as not sure what to do, I will have a wide range of ages with me celebrating, I know we all want to dress up but need ideas on what to dress up as and what to do to celebrate, all ideas will be welcome and I will appreciate any idea as I have just come to a bit of a standstill. Thanks in advance :-)