Chicago Flight Training.com
- A training school specializing in accelerated training programs for private pilot, instrument pilot, commercial pilot and certified flight instructor licenses and ratings.
- http://www.chicagoflighttraining.com/index.htm

Windy City Rollers
- All-female flat-track roller derby league. Includes league and team information, news, events, photographs, and related links.
- http://www.windycityrollers.com/

10pin Bowling Lounge
- Billed as an upscale bowling center, with lounge, video wall and sound. Lists rates, small plates menu, party package details, and special events.
- http://www.10pinchicago.com/

Lincoln Park Lacrosse Club
- Offers news, club history, current and past schedules, team rosters, sponsorship opportunities, and lacrosse links.
- http://www.lplax.com

Chicago Sun Club (CSC)
- Traveling group for nude recreation. Members of the Midwest Sunbathing Association (MSA). Details on activities, membership information, and related links.
- http://www.midwestsun.com/csc.html

Chicago Mountaineering Club
- Climbing club. Membership information. Schedule of upcoming events. Photos from Mount Rainier, Washington; and Long's Peak, Colorado.
- http://www.cmcwebsite.org/

Sports Monster
- Adult recreational sports league organization. Welcomes individuals and teams to play in almost any team sport. Includes schedules, locations, and details of its offerings.
- http://www.sportsmonster.net/chicago/

Sport and Social Club
- Company that organizes fun social events, and recreational sports leagues for adults in major metropolitan areas throughout the United States, such as Chicago and San Francisco.
- http://www.sportandsocialclubs.com/

Chicago Audio Society
- Forum for audio and music enthusiasts. News, information, events calendar, membership information and mailing lists are featured.
- http://www.chicagoaudio.org/

Waveland Bowl
- A 24-hour, 365 days per year bowling center featuring adult and youth league information, hours of operation, glow-in-the-dark bowling, private parties and a pro shop.
- http://www.wavelandbowl.com/

Creative & Production Resources, Inc. (CAPRI Events)
- Event-marketing and management company producing participatory special events, such as multi-sport, triathlon, runs and walks. Site features participants results, event hotlines, registration, links and contacts.
- http://www.caprievents.com/

City Pool Hall in Chicago
- A host for BCA and APA billiards leagues. Presently hosting APA, BCA and the Camel Shootout.
- http://citypoolhall.com/