Thousands of Parrotheads wearing Hawaiian print shirts and grass skirts invaded Fenway Park to see Jimmy Buffett and the Coral Reefer Band Friday and Sunday nights.

A lack of parking around Fenway did not stop the many Buffett fans, better known as Parrotheads, from tailgating and partying on Yawkey Way and Lansdowne Street hours before the sold-out concerts.

Many of the fans were dressed in what they think is Hawaiian attire, including grass skirts, coconut bras and even mu-mus. Others sported Buffett shirts and carried colorful stuffed parrots. Mimes, street vendors, middle-aged people and lots of drinking contributed to the festive yet relaxed atmosphere.

Dwayne and Felicia Archer, who were helping their daughter move into Boston University housing, attended the Friday night concert and said they had seen Buffett before and weren’t going to pass up another chance, despite the $84 ticket price.

“It’s just a big party,” said Felicia Archer.

Buffett is known for sunny, Caribbean-sounding pop songs such as “Cheeseburger in Paradise” and “Margaritaville.” He also owns two successful restaurant chains named after his songs.

Many fans had seen Buffett before, and some even traveled from other states to see him in Boston – Rick Tosh said he came from San Francisco because he enjoys Buffett’s persona and attitude.

“As a Jimmy Buffett fan, you want to emulate his life,” he said. “He does everything himself and is a great businessman, yet he still finds time to relax and have fun.”

Recent college graduate Melissa Strafford, of Las Vegas, was already on her fifth margarita two hours before the 8 p.m. concert.

“His concerts are about cool people being laid back and drinking together,” Strafford said. “Margaritas equal happiness.”

College of Communication graduate student Emilia Turney-Mela did not have a ticket, but she was able to hear the music and sing her favorite songs from outside Fenway along with friend, COM graduate student Renee Spurlin.

“We’re big Jimmy Buffett fans, but we are college students and we just had to pay for books,” Turney-Mela said. “Why pay $84 when you can hear it for free?”

Beth Hamilton and Melanie Segal, both 18, also spent their Sunday night outside Fenway listening to the concert.

“The Jimmy Buffett concert sounded more enticing than studying,” Hamilton said.

John and Jessica Worthington attended the Friday night concert and listened to the Sunday show outside Fenway.

“I don’t think we are Parrotheads, but we have all his CDs and love his music,” John Worthington said.