Bridgevening.com recommends these free site tutorials

Wikipedia

For the most comprehensive, easily accessible information on Duplicate,Rubber,Chicago and “Goulash” Bridge go to Wikipedia and type in search for these games.

Also visit www.acbl.org/learn/scoreRubber.html

Bridgevening.com recommends these on line Bridge rooms

Free to play sites

Bridge Club Live
50 tables

Bridge Base on line
1700 tables with 8000-11,000 players.

You can easily find a partner on both of these sites and play Duplicate, Rubber and Teams Bridge.