Nearly everyone has heard of the Chicago Cubs, the loveable losers. Playing in Wrigley Field, the second oldest ballpark in the United States, certainly guarantees sell-out crowds at every game. The general draw of Wrigleyville certainly helps attendance as well. Regardless of the team and their winning or losing ways Wrigley Field offers fans an amazing baseball experience in the heart of Chicago's North Side. The big drawback is that currently, it costs quite a bit to go to a game. New ownership has promised more affordable family friendly ticket packages so I recommend checking those out first.
Chicago White Sox
If you're heading to Chicago to see the Cubs I recommend catching a game at Cellular One Field (formerly Comiskey Park) as well. The stadium does a great job of offering fans an affordable option with many kid-friendly sights. There is also a field level bar at the stadium which offers fans a different viewing experience.
The Grizzlies play in Sauget Illinois which is just south of East St. Louis. The team plays in the Eastern Division of the Frontier League. The Frontier League is an independent baseball league with teams throughout the Midwest. None of the teams are affiliated with Major League Baseball but their teams are often farmed for talent. The Grizzlies are typically a .500 team at or near the middle of the division in wins. GCS Ballpark was built in 2002 and currently holds 6000 people.
Southern Illinois Miners
The Miners are a team that is new to the Frontier League. Rent One Park was built recently in Marion Illinois. In 2010 the team ended the season at the top of the Western Division. Rent One Park currently holds more than 5500 fans with seating spread out between seats, bleachers, lawns and picnic gardens. There are also fireworks displays after many games throughout the season.
Joliet is south of Chicago. The Slammers play in the Eastern Division of the Frontier League. Silver Cross Field has been around for about 10 years and features reserved seats, lawn and picnic area tickets. The Slammers recently replaced the Joliet Jackhammers. Technically they're a new team but when the team was the Jackhammers, they did not find much success in the Frontier League. Head Coach Bart Zeller was previously the hitting coach for the Southern Illinois Miners.
Kane County Cougars
The Cougars play in Geneva, Illinois, a bit west of Chicago. The team plays at Philip B Elfstrom Stadium which holds 7400 fans. The Cougars are currently the A-League team for the Kansas City Royals, an organization stocked with minor league talent. Previously the team was affiliated with the A's, Marlins and Orioles. The stadium will often get packed when Major League players need to rehab from injury and make some starts in Geneva.
Windy City Thunderbolts
Standard Bank Park holds 3200 people and is currently the home of the Thunderbolts in Crestwood Illinois. The Thunderbolts have been a force in the Frontier League, making the playoffs each year since 2007. They are also one of two teams in the league to have won back to back championships.
The RiverHawks play in Loves Park, Illinois, a suburb if Rockford. The team has moved around a bit and has played in a few different stadiums but they currently play in Marinelli Field. From 2002 to 2009 the RiverHawks played in the Frontier League, they now play in the Northern League. 2010 was their first season in the Northern League and they finished 5th.