In Bangkok ist is not a problem to take a girl to your hotel. It will not be any hotel where she is not allowed to enter your room (like for example in other countries like China), but there are still different ways how hotels will handle that:
Tip: If you share a room with a guy or think about take home 2 girls for a threesome, better clear it with the hotel in advanced. Most hotels are very strict with the "2-person-rule", so means if 2 guys checked in already, the girl will be the 3rd one and will be charged (even that hotel would not charge, if only one guy checked in).
There are a lot of pages who will recommend you which hotel you should book (should be near the place you want to play and pickup) and should also be girlfriendly). So here you can find ideas about that:
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