Also, sometimes a description in a dependent clause (also called a subordinate clause) can be too long, making the sentence wordy. Sometimes it is simpler to start another sentence describing a particular aspect of what it is you are describing. For example, in my correction I separated two aspects of the capsule hotel in two different sentences. In one sentence, the fact that the hotel has no rooms is mentioned. In the other, the description of the capsules themselves is included. Separating these two aspects into different sentences makes your description more clear.

The relative pronoun comes after the noun "areas," but the dependent clause that follows does not describe the noun "areas." Instead, it describes the noun "hotel." If it is descriptive of a noun, the dependent clause should be placed after the noun that it describes. Otherwise, it can lead to confusion.

Notes:

1. "Capsule hotel is a cheap accommodation in downtown areas, in which..."

Capsule Hotel

Acapsule hotel provides a cheap accommodation in downtown areas.In such a hotel there are no rooms.Instead, there are rows of sleeping noduleswith each column containing one unit stacked on top of the other. Each "capsule" is fully equipped with a TV, clock, radio, and ventilator. The accommodation fee isseveral thousand yen; thus, being considered low-budget compared with "business hotels" (cheap hotels cateredmainly tolong term business visitors), this type of hotel is used for short business trips or for one-night stays such aswhen a traveler has missed the last train of the day. Most capsule hotels are available only to men.

Upon arrival at the hotel, guests put their baggage into the lockers and change into a dressing gown provided by the hotel. In most cases,the hotel is equipped with a lounge area, a sauna, and a communal bath. Many capsule hotels provide massage services and a cafeteria that opensuntil late at night.

It's been over 30 years since Japan's first capsule hotel opened for business in Osaka in 1979. Nowadays internet cafes are equipped with shower rooms and are becoming the next capsule hotel.

Notes:

1. "Capsule hotel is a cheap accommodation in downtown areas, in which..."