Poseidon Entertainment Complex (波塞冬泰浴) is located in Bangkok's Huai Khwang district (Huai Khwang), close to the MRT Sutthisan station. It is a well-established soapy massage parlor center founded in 1999.

Poseidon features multi-level service areas inside, with the 2nd and 3rd floors serving as fishbowl zones offering different tiers of technician selections. Service fees on the 2nd floor range from approximately ฿2,500 - ฿3,000, while on the 3rd floor, depending on the technician's profile and room type, costs start at ฿3,800 and up. Room styles vary, though standard rooms feel somewhat dated, while premium VIP rooms offer greater appeal. Additionally, floors 4 through 11 include themed suites, with some blending traditional Thai elements with modern design, ideal for guests seeking privacy and comfort.

In terms of the ladies' quality, while market competition and business slowdowns have led to a slight dip in their overall attractiveness compared to the past, the service attitude remains consistently positive. Overall, Poseidon serves as a solid mid-range option for those trying soapy massage parlor experiences for the first time.

Poseidon also offers dining and karaoke services, with a menu spanning Thai, Chinese, Japanese, and European cuisines. The karaoke sound system and song library both deliver impressive performance, providing guests with a variety of entertainment options.