Sure, I'd be happy to help you plan your 9-day itinerary in Bangkok! Here's a suggested itinerary for you:

Day 1: Arrival and Relaxation

• Arrive in Bangkok and check into your hotel
• Take some time to relax and recover from your flight
• In the evening, head to a rooftop bar like Vertigo at Banyan Tree or Octave Rooftop Lounge & Bar for a stunning view of the city

Day 2: Explore the Grand Palace and Temples

• Start your day early and head to the Grand Palace, one of Bangkok's most iconic landmarks
• Visit the Temple of the Emerald Buddha, which is located within the Grand Palace complex
• Afterward, visit Wat Pho, home to the famous reclining Buddha statue
• In the evening, take a stroll through the bustling night markets of Chinatown

Day 3: Visit the Floating Markets

• Take a day trip to the Damnoen Saduak Floating Market, one of the most popular floating markets in Bangkok
• Enjoy a boat ride through the market and sample some of the delicious street food
• In the afternoon, visit the nearby Maeklong Railway Market, where vendors sell their goods right on the train tracks

Day 4: Explore the City's Art Scene

• Visit the Bangkok Art and Culture Centre, a contemporary art museum in the heart of the city
• Check out the street art in the nearby neighborhood of Phra Athit
• In the evening, catch a performance at the Thailand Cultural Centre

Day 5: Take a Cooking Class

• Take a cooking class and learn how to make some of Thailand's most famous dishes, such as pad thai and green curry
• In the evening, head to Khao San Road, a popular backpacker area with plenty of bars and restaurants

Day 6: Visit the Chatuchak Weekend Market

• Spend the day at the Chatuchak Weekend Market, one of the largest markets in the world
• Browse through the stalls selling everything from clothing to antiques to pets
• In the evening, head to the nearby Rot Fai Night Market for more shopping and street food

Day 7: Relax at a Spa

• Take a break from sightseeing and spend the day relaxing at a spa
• Try a traditional Thai massage or indulge in a luxurious spa treatment
• In the evening, head to the Asiatique Night Market for dinner and shopping

Day 8: Visit the Jim Thompson House

• Visit the Jim Thompson House, a beautiful traditional Thai house that belonged to an American businessman who helped revive the Thai silk industry
• Learn about Thai culture and history at the museum on the property
• In the evening, take a sunset cruise along the Chao Phraya River

Day 9: Departure

• Enjoy your last day in Bangkok by visiting any sights you may have missed or doing some last-minute shopping
• Depart for the airport in the evening

I hope this itinerary helps you plan your trip to Bangkok! Let me know if you have any questions or if there's anything else I can help you with.