Thanying Restaurant (@Amara Hotel Singapore)

When I have guests and want to take for a nice Thai Restaurant, this is the first one I would think of. The hotel is located in Level 2 of Amara hotel near Tanjong Pagar MRT station, along Tanjong Pagar Road.
Its chain restaurant in Sentosa Amara Santruary is also very nice. I have been there in both business and private occasions.

Yhingthai Palace

Premium Thai Restaurant in City Hall area: this place offers you adequate service level for your memorable dinner (anniversary, business occasion etc).

http://www.yhingthai.com/

Naj (Thai Restaurant)

One of the best, high class Thai restaurant I recommend in Bangkok Sathorn area is this one near BNH Hospital.
The atmosphere, the content of meal is up to the level to bring your business partner or your loved ones.
Most cuisine is recommended.
http://www.najcuisine.com/webnaj/home.html

Somboom Seafood @ Ratchada Pisek

My business partner took me to this very popular seafood restaurant in Bangkok. There are several branches but the one I went is just above the
MRT Huai Kwang station, across the street from Swiss Hotel Le Concorde.

The must try dish is the Crab Egg Curry. Unlike the name the sauce is not just spicy but rather sweet Spicy. So even for those of you who are not so keen on Thai Spicy food can also try. This may be similar taste to Singaporean style Chili Crab sauce.
See the photo in the following link:
http://4travel.jp/overseas/area/asia/thailand/bangkok/restaurant/10335815/tips/10293636/#contents_inner

Address:
167/9-12 Huay-Kwang Intersection, Ratchadapisek Road, DinDeang , Bangkok 10320

Their official site (not so informative):
http://www.somboonseafood.com/e-index.html

Branches in Bangkok:
1. Bantadthong Branch & Chinese (Cantonese style)
2. Surawong Branch
3. Ratchada Pisek Branch
4. Bangna (Sukhumvit 103)
5. SamYan

Thai village Shark fin restaurant

Looking for nice sharkfin restaurant in Orchard Road area?
Why not try this Thai Village Sharkfin Restaurant in annex of Goodwood Hotel of Singapore along Scott's road?
The most prominent is the whole pot of shark skin. The cost performance is great, though the bill can easily rise above 100SGD per head with other fish with some glasses of beer.
Address: 16 Scotts Road Singapore 22822
Tel: +65 6440 8251