plz guide me that which are joiner friendly(no joiner fee) hotels in bangkok specially what about samran palac

Place is in quite good location, you can book directly with the hotel on its website: http://www.samran.com

The hotel located at the center of Bangkok where you can run around in the city easily.

Make the reservation for two people.
Then challenge the hotel to dare to charge extra for the second person.
Generally most hotels in Bangkok will turn a blind eye to "joiners" although your "guest" will probably be required to deposit her (his) i.d. card.
This is NOT, however, always the case in Pattaya.