Democrats have a tenuous hold on the Senate, but this week and in the next month, show biz figures are hosting a flurry of candidates and incumbents in an effort to maintain the majority.

On Wednesday, Sen. Sherrod Brown (D-Ohio) raises money at the Hancock Park home of Steve and Lizzie Blatt, with Martin Sheen, Chad Lowe and Tim Hoy among the co-hosts. Tickets start at $250 per person.

Alan and Cindy Horn are planning a reception on March 9 at their Bel Air home for the Democratic Senatorial Campaign Committee, featuring nine women 2012 candidates. The event is called “Women on the Road to the Senate: 12 and Counting,” and is scheduled to include Sen. Maria Cantwell (D-Wash.), Sen. Dianne Feinstein (D-Calif.), Sen. Kirsten Gillibrand (D-N.Y.), Sen. Amy Klobuchar (D-Minn.), Sen. Clare McCaskill (D-Mo.) and Sen. Debbie Stabenow (D-Mich.). Also expected are challengers Tammy Baldwin from Wisconsin, Shelley Berkley from Nevada and Heidi Heitkamp from North Dakota.

Others expected include Sen. Patty Murray (D-Wash.), the chair of the DSCC; Sen. Kay Hagan (D-N.C.), chair of the Women’s Senate Network; and Sens. Barbara Boxer (D-Calif.), Barbara Mikulski (D-Md.) and Jeanne Shaheen (D-N.H.).

Tickets to the event start at $1,000 per person, and contributions are being collected by a joint fundraising committee. Contributions are being divided 60% to the DSCC and 40% to be divided evenly among candidate committees. The exception is Cantwell, whose campaign does not accept contributions from multi-candidate committees.

Other cohosts of the event include J.J. Abrams and Katie McGrath, Dayna and Steven Bochco, Marcy Carsey, Michael and Jena King, Kelly Meyer, Nancy Stephens and Rick Rosenthal, Corky and Mike Stoller, Barbra Streisand, John and Marilyn Wells and Peg Yorkin.

Baldwin — facing a tough campaign to keep a Senate seat in Wisconsin in Democratic hands — will also raise money on March 12 at the home of Stanley and Betty Sheinbaum. Bradley Whitford is billed as the special guest. Tickets start at $250 per person, and the event is organized by the JStreet PAC.