Hen do - help!

Hi everyone

We have my sister's hen do in Brighton in a few weeks and we have been let down on the daytime activity we had booked and it's now cancelled.

We are now in a last minute panic to find something else to do and we are thinking of maybe just doing something like cocktail making and a treasure hunt. Can anyone recommend where to do cocktail making? Also has anyone done a treasure hunt in Brighton, was it good and who did you book with?

Also any other ideas welcome! Just for a daytime activity as we are sorted for the evening.