For residents, around ¥15000~¥20000(if the girl feel safe with you, might can bargain down to $¥10000, but only a few cases) For foreigners, usually ¥20000~¥25000, plus some extra foreigner service fee, but also depend on how good is your nihongo, if you can communicate well with those girls, you can try bargain too. So, "communitication" and "be polite" are key words BECAUSE if the girls dont feels safe and comfy. why should they hang out with you?