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Cruisin Ground (Site) - Gay guide to places around the world where you can meet other men.
Sexclubs World-Wide (Site) - Link list for sex services.
Global Gay Guide Network (Site) - Gay guides to the whole world.
The World Sex Guide (Site) - Researching prostitution around the world.
The Guide Online (Site) - Complete gay guide: travel, entertainment, sex. Organized by geographical region. There's a separate section just for saunas.
ClubHombre.com (Site) - A world-wide prostituion guide. [Membership]
Escorts Tonight (Site) - Escort guides around the world, from San Francisco to London to Tokyo, with links to escort sites.
Escorts.com (Site) - Industry information and searchable ads from escorts, masseuses, strippers, nude cleaners, clubs, agencies, and other adult entertainers or organizations.
Cruising for Sex (Site) - Worldwide listings of places gay men are cruising for sex. Includes columns and opinionated reviews.
Travel Sex Links (Site) - Guide to nightlife and adult entertainment all over the World. Escorts brothels and nightclubs and their links and indexes.
Stripclublist.com (Site) - Over 4,000 adult strip clubs in 72 countries and is viewable in 4 languages.
World Sex Archives (Site) - Interactive discussion and worldwide prostitution and escort services database. [Membership]
World Sex Guide (Site) - Detailed information region by region information and updated regularly, about prostitution.
Adult Travel Guide (Site) - List of related sites.
The Prostitution Reporter (Site) - Collection of various reports from most countries in the world. Provides first hand experiences with the international scene and sex tourism. Most reports also on the World Sex Archive (membership) and World Sex Guide.
American Girls Are Easy (Site) - Two American girls detail their three-month trip to Europe with a twist, including a not-so-usual travelogue, photographs and city guides.
21orover.com (Site) - Discussion board, categorised by region and country, with info on sexual services around the world.

Guides