I don't think there are any shops still doing "real" tiered service these days, are there? What I mean by real tiered service is you can pick a girl and pick a service tier.
As far as I know, only N5M and 42G offered this type of tiers, but people started realising it was a good way to get away with paying less because the girls just ended up giving the same service no matter what tier was chosen, so they stopped doing that.
Now all the shops I know will only offer one tier per girl. That makes the tier redundant. The price is just "this girl and her services". Doesn't matter that they call it.