Majestic Grande is the nicest hotel you can get near Nana which allows "guests". I have stayed in their suites. Very nice. Had a gang bang with 3 BGs. Girls didnt want to leave.
Sorry. You have to be suicidal to ride a motorcycle in bkk. Leaving bkk and going out on the open roads to pattaya might be fun. Dont believe me. Check out the youtube video : No prisnors 2012 to see alot motorcycle crashes in Thailand and Russia.