It is even worse here in Belgium. Some years ago a very (very very very) big arcadein Antwerp closed. Reason was not so obvious. It closed because of violence and drugs traffic.
Anyhow, the biggest arcade still open in Belgium is at Blankenbergen. The place where the forum host got his Namco Theater.
I visited the place this summer but most classics are replaced by bingo and 'munt schuivers' - not sure how it is called in english. A big bowling alley covers most space now. The former place of the Namco Theather is now occupied by airhockey tables.