Dana point singer-songwriter George Lawton has a...

Dana point singer-songwriter George Lawton has a chance to share a concert bill with Joni Mitchell, Peter, Paul & Mary, and others who will be playing at the Troubadours of Folk festival June 5 and 6 in Los Angeles.

Lawton has been chosen as one of 21 finalists for a live-performance competition May 22 at Highland Grounds coffeehouse in Hollywood. Lawton and his competitors will each play a 10-minute set, and a panel of judges from record companies and radio stations will pick two winners to play on the Troubadours bill. Finalists were chosen from more than 250 cassette entries.

Lawton previously has been heard on “Co-op,” a compilation CD by unsigned Orange County artists released several years ago. He also wrote and performed four songs for “Pizza Man,” a film directed by his brother, J.F. Lawton.

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Trading drum sticks and guitars for balls, bats and gloves, two celebrity teams called the Rockers and the Rollers will play softball in Long Beach on May 23 to raise money for the TJ Martell Foundation, which provides funds for cancer and AIDS research. The players include Melissa Etheridge, Jeff Ament of Pearl Jam, Chris Carter of Dramarama, Weiland of Stone Temple Pilots, Tone Loc, Kerry King of Slayer, and Freedom Williams of C&C; Music Factory, as well as Anthony Smith of the Los Angeles Raiders and former Cal State Fullerton football hero Mark Collins, who now plays for the New York Giants. The celebrity competition follows two games matching local radio stations. It starts at noon at Blair Field, at 4700 E. 10th St. $20. (714) 740-2000 (Ticketmaster).

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Fullerton Museum Center will waive admission on Tuesday in honor of International Museum Day. The museum, normally closed on Tuesdays, is now exhibiting “The Realm of the Coin: Money in American Art,” a collection of 35 paintings, sculptures and photographs by American artists. (714) 738-6545.