It... kinda varies. Could be several dozen Euros, could be several hundred. Lately, it's mostly the former, thanks to apathy (partially based on having more stuff than I can use in years).
Well, do you want us to include our cable/satellite TV and/or internet connection costs in the total? For most of us, that's probably largely entertainment as well...
Well, I don't have a tv ... and I place the internet under a business expense, due to my job ... though at least some of it definitely counts as entertainment...
Comes up to about 40-50, including a WOW subscription (though I expect it to last just a month or so more). If there's a good play or musical might come to double that.