The karaoke is famous for having young Indonesian girls. I was told that they have a special VIP room popular with high-profile members of the Indonesian government and administration.
You can sleep in the hotel if you want. The price is reasonable and if you come to Jakarta for massages and to find girls, it is very well located in the heart of Lokasari's red-light district.
You can book it for instance on AirAsiaGo website: Book Hotel Olympic Lokasari - Best Price Guarantee
Olimpic Spa & Karaoke Jakarta
Jl. Mangga Besar VII Blok.A63 Jakarta Barat
Telephone: (62 21) 6245628, Fax: (62 21) 6245628