Data Novice - Please help? How to analyse data with multiple variables

I'm new here and only have a basic knowledge of statistics. I hope someone can help.

I want to show which genre of show at a theatre is most popular amongst different group of customers.

More customers came to Music performances than Films, but that because there were 50 music performances and only 10 films.
Some of the same customers could have come to both Music and a Film.
I have a total 'population' of each type of customer in my area. So can show % of population for each genre. But Film will always show low in both customers and ticket sales (I don't have ticket figures for this particular data).

I want to say - The most popular genres for this customer group are...

Keep it simple please?