I did it once and asked them in the entrance they hesitated then said "ok but only this time and you can't play in the room", so we played in the common space only. That was my last time going there.
9259 it's better to go there as a single guy, they don't allow couples to play with single girls.
Colors, Retreat and 440 aren't strict in that regard.
But if you want to do only play with couples maybe try olive21 where only couples are allowed in.
I haven't been there for 3 years I think but the 2nd floor isn't closed, it's ok to go there if you find a partner but you need to pay additional 2k if you're a single guy. couples don't need to pay that fee.
9259 has a better crow, even when there is more guys than girls (usually the case everywhere I guess) they are not hostile
retreat was nice too although I got jealousy looks each time I left a playroom with two girls. there is no public sex there, happening only happens in the private rooms.
many single men of course and the agressive kind
note that I went with my gf who's way hotter than the girls there so that doesn't help getting a friendly vibe
also the drinks were really bad, I know it's not the main attraction but still
first time you go you have to call them so they tell you how to enter,
went a week ago and had a great time there
tried Honey Trap in Ueno too and we decided to leave after 1 hour, not my kind of crowd
they do but you need to speak Japanese or be accompanied with someone who does.
if you want to feel safe I can suggest you go with a couple (me and my girl friend for example :D )
this week we're probably going tomorrow
or maybe they had a bad day I don't know but I don't care, as a customer I don't return to places where I was treated rudely
there are many HP I didn't try yet, I'm curious about retreat, honey trap and I may try bliss out too.