Siam. Kempinski GF and Amazing
I stay in Siam. Kempinski.
It's a wonderful place and GF.
You can access the hotel from the Siam Paragon without passing by the lobby etc.
I stay in the Royal Wing, and the elevator (needs a Card) is easy to reach.
The location is as mentioned by others, very niche an silent but. A 5-minute walk from BTS.
But they also have a shuttle from the Starbucks. It's convenient to use.
Night Hotel, Sukhumvit Soi 15
This place is recommended for punters. Location is between Nana and Cowboy, very quick tuk tuk from Nana Plaza with your bar fine. Thermae and street freelancers are very close. I've never seen a place with so many girls coming and going, reception collects and returns the girl's ID very quickly.
Breakfast is good, rooms are clean and well maintained. I'm impressed with the layout of my room regarding places to store my stuff (shelves, drawers, hanging closet). The bathroom and shower even have nice shelves for all your tiny stuff. One of my Thai hotel pet peeves is crazy-complex light switch designs, but this place has lots of lighting options without unnecessary complexity. Walk in shower big enough for two.
Swimming pool is on the small side and not beautifully decorated, which is a non-problem for me.