Never mind the unfortunate title, here's the kind of host bar that welcomes both Japanese & Foreign customers.

http://kids-jp.com/en/tk/system.php


As for the expense, well of course it's more expensive than Thailand. I think the advice was sought for a trip of just 4 days length, so anyone whose finances are in good shape can splash out for such a short trip.
It might get expensive over something like 4 weeks, or if you keep going back every year, but 4 days should work.