The most frequent cinemagoers in the EU live in France: in 2015, 29.3% of the population said they had been to the cinema at least 4 times.
They were followed by residents of Luxembourg (26.4%), Belgium (22.7%) and the Netherlands (21.9%).
In total in the EU, 17.7% of the population went to the cinema at least 4 times in 2015.
The source dataset can be found here.