hmm, not that much i think... Last time i entered a game center it was 1 per credit, with a money counter limited to accept only 2 coin... expensive of course, but what can you do if you want to play it ? you just shut up your mouth and release the cash... I don't know how much it is in england but 1 for 2 credits ?
In the UK, usually 1 for 1 credit. Arcades have almost completely died out here, with a couple of notable exceptions in London. The only place to find a machine now is in bowling alleys.
Yeah, there's usually a few arcade machines in Bowling Alleys. There's usually a Time Crisis arcade machine (or similar) in most cinemas too. Amusements halls usually have one or two as well. I've never seen a proper video arcade. Probably due to console gaming and the ridiculous price they charge per game on arcade machines. They are usually 1 per credit. I just don't have the money to afford that.
In the United States, the typical price is 1 USD for four credits, with deep volume discounts if you buy $20 worth of credits at once (e.g. 140 credits for $20). But then a DDR machine might take 3 credits.
So 140 credits for 10... that's less than 1/10 of what most UK arcade machines cost. Even if you need multiple credits, that's still cheap.
Around here, the cheaper games are 50 cents a play and things like the dance games are $1; at some places it's twice that, I know. Of course, that's still substantially cheaper than it is in the UK, evidently; 1 a game is...absurd.