Diamond Spa

Two thousand baht for an hour of aroma massage, ฿2,500 for 90 minutes: Diamond Spa's card is short and easy to read. A whirlpool jacuzzi adds ฿500. The website lists it under Sathorn–Kalpapruek and describes special rooms for gentlemen. Google files it under erotic massage, and its search terms include the Thai อาบอบนวด.

It suits someone on the Thonburi side who wants a published price, a walk-in door and a late finish. Skip it if you're relying on the trains, since the nearest MRT stop is more than two kilometres away. Its 5.0 rating looks strong, but it rests on only 11 reviews, most of them a line long.

Its rate card lists:

• Aroma massage 60 min: ฿2,000
• Aroma massage 90 min: ฿2,500
• Whirlpool jacuzzi (no duration listed): ฿500

The website adds that the jacuzzi is available at some branches only, so check that this one has it before you plan around it. It also advertises two discounts: 5% for a Google Maps review and 10% in your birthday month.

Walk-ins are accepted, according to the listing. No booking channel, phone number, payment method or language is published, so turning up is the plainest route. The cheap list has more shops that start around this price.

The address is 588/6 Kalpapruek–Sathorn Road, Bang Wa, Phasi Charoen. This guide files it with the Rama 2 district. MRT Phasi Charoen is the nearest station at 2.28 kilometres, about a 37-minute walk, so a taxi or motorbike taxi makes more sense.

The door stays open until 02:00, two hours past the last train. Other late shops are on the late-night list.

Residents of Bang Wa, Phasi Charoen and the Rama 2 side, mainly: a simple card, a jacuzzi option and no need to book. It suits visitors less well, given the distance from the rail lines. If you're based on Sukhumvit, start with the Top 20 or the VIP rooms volume for jacuzzi rooms nearer the centre.

Diamond Spa holds a 5.0 Google rating from 11 reviews, every recent one five stars.

Most reviews are short: 'wonderful service', 'very good', 'excellent'. The longer ones point in the same direction. Reviewers mention a clean shop with a pleasant atmosphere, and one says it's conveniently located. Another says the place looks exactly as pictured, and one notes a wide choice of staff.

There are no complaints among them. With so few reviews, and so little detail in most, read the rating as a good sign rather than a settled one.