At the Lantana Resort Hotel Bangkok, guests can choose from a range of rooms including Deluxe Suites, Deluxe King Rooms, Executive Suites, Superior Suites, and Deluxe Twin Rooms. All rooms are non-smoking and can accommodate 2 adults. Deluxe Suites and Executive Suites have larger sizes of 603 sqft and 646 sqft respectively, while Deluxe King Rooms and Deluxe Twin Rooms have smaller sizes of 301 sqft. The bed options include King size beds and Queen size beds for couples, as well as Twin beds for those who prefer separate sleeping arrangements.

Guests at the Lantana Resort Hotel Bangkok can spend their time enjoying the leisure amenities provided by the hotel. They can unwind and relax in the bar, enjoying their favorite drinks and socializing with fellow guests. For those who need to catch up on work or attend to business matters, there is a business center available. Additionally, guests can enjoy the outdoor fireplace, providing a cozy and warm atmosphere for gatherings with friends and family.

As for dining options, the hotel has a restaurant on-site known as Restaurant #1. Here, guests can indulge in delicious dining experiences without having to leave the comfort of the hotel. Whether it's enjoying a hearty breakfast, a leisurely lunch, or a romantic dinner, guests have the convenience of having a restaurant right at their fingertips.

According to the provided data, there is only one restaurant mentioned as "Restaurant #1" available at the Lantana Resort Hotel Bangkok. No additional information is provided about other on-site restaurants.