If April showers are delaying your plans for fun in the sun, remember that plenty of entertainment can be found in Antioch’s cozy El Campanil Theatre this month.

It’s not too late to reserve your seats for the Saturday, April 10 performance by The Four Freshman. The talented quartet will make a stop in Antioch as part of their international tour. Tickets for the 8 p.m. show are $30 for adults, $27 for seniors and $15 for students. For those who want to get up close and personal with the action, Golden Circle tickets, for seating in the first three rows, are $40.

Although the original members of The Four Freshman have retired, the new blood of Bob Ferriera, Brian Eichenberger, Curtis Calderon and Vince Johnson keep the group’s signature vocal harmonies alive, delivering such hits as “It’s a Blue World,” “Mood Indigo,” and “Graduation Day,” which have been delighting crowds for more than 60 years. For more information about The Four Freshmen, visit www.4freshmen.com.

If you’ve already got plans for this weekend, don’t worry. There are still other great shows lined up this month. Why not get into the Cinco de Mayo spirit a little early this year by attending Fiesta Mexico on Saturday, April 17? Bay Area-based Ballet Folklorico Costa de Oro will enchant crowds with its traditional Mexican dances. Through dance, Costa de Oro is able to elegantly teach audiences about Mexico’s rich culture and customs.

The dance group will be accompanied by Mariachi Mexicanismo, which has been entertaining the Bay Area for more than 10 years as the official mariachi band of Univision, the Bay Area’s top Spanish broadcast channel. Mariachi Mexicanismo will serenade the crowd with classic tunes and folk songs as the dancers perform in their brightly colored, authentic attire. For more information, visit www.bfcostadeoro.com or www.mariachimexicanisimo.com.

The fun keeps on coming that weekend as East County Idol comes to El Campanil on Sunday, April 18. After two qualification rounds, the top 18 singers representing Antioch, Bay Point, Bethel Island, Brentwood, Discovery Bay, Knightsen, Oakley and Pittsburg will sonically slug it out for the title of East County’s top songster and a cash prize. Presented by the Antioch Music Foundation, East County Idol features some of the most gifted home-grown talent performing pop hits, rock ballads, tender love songs, cheerful country crooning and a maybe even a Broadway tune or two. For more information, visit www.antiochmusic.org.

Rounding out the April schedule is a performance by Alameda’s Beatles tribute band The Sun Kings. Formed in 2001, band mates Drew Harrison (no relation to George), Michael Barrett, Bill Zupko, Peter LoMenzo and Steve Scarpelli perform all over the Bay Area, but return to El Campanil as part of the kickoff of their 2010 tour to play the Beatles’ earlier classics such as “I Want to Hold Your Hand,” “A Hard Day’s Night” and “Can’t Buy Me Love.” For more information, visit www.the-sun-kings.com.

Also in April, the Last Sunday of the Month Film Series continues with a screening of “An American in Paris” starring Gene Kelly and Leslie Caron. The classic film from 1951, which tells the story of a war veteran pursuing an art career in France, will grace El Campanil’s screen on April 25. The San Francisco Opera Grand Opera Cinema Series will also continue in April with a showing of Camille Saint-Saëns’ “Samson and Delilah” on Sunday, April 11.

The El Campanil Theatre is located at 602 W. Second St. in Antioch. For more information or to purchase tickets, call 925-757-9500 or visit www.elcampaniltheatre.com.