Chicago Contract Bridge Association

• West Suburban Duplicate Bridge Club, Darien, IL.
• Bridge Center on Sheridan, Chicago, IL.

• American Contract Bridge League
• World Bridge Federation
• ECats Bridge
• Karen Walker's Bridge Site
• Great Bridge Links

• District 13 - Central Organization for WUMBA, CCBA, and the GMBA (Milwaukee Unit)
• Greater Milwaukee Bridge Association (GMBA), Unit 222
• Wisconsin, Upper Michigan Bridge Association

• Unit 208 - Central Illinois Bridge Association (including Champaign, IL)
• Mid Atlantic Bridge Conference
• District 8 - Newsletter (published once every two months)

In no particular order...

• Bridge Base Online
• Okbridge (the oldest and the original)
• The Zone (on the Microsoft Network)
• Swan Bridge
• ACBL eBridge