No black armbands, no memorial posters, no makeshift shrines for bassist John Entwistle, not yet a week dead. It was simply business as usual in the audience Wednesday at the Who concert at Shoreline Amphitheatre.

At the second show since founding member Entwistle died of an apparent heart attack, the audience was intent on having a good time. Some of the listeners didn't even seem to be entirely sure who Entwistle was.

"Didn't they tour without him before?" said Brian Blasquez of San Leandro, who was celebrating his 19th birthday at the concert. "I don't think he's been with them through the '80s. He was in and out. But it sucks. I thought it would be pretty cool to see the three original members."

Longtime Who fans sounded more sentimental about Entwistle's loss, but equally enthusiastic about the concert. "I'm excited," said Tom Kowalski of San Francisco, who first saw the band at the Fillmore Auditorium before many in the Shoreline crowd were born. "I'm sorry to see the band in this situation, but it's probably the last time they'll ever perform. I wouldn't miss it."

Harry Furst of Walnut Creek, who first saw the band at Philadelphia's Spectrum in 1971, used to run across Entwistle on Mexican vacations. "He was the kind of guy who wanted to be on the road," Furst said. "Nobody could ever replace him. He was a real master."

Doug Liebel and Melette Maypark of San Jose were attending their first Who concert and had been listening to the greatest hits for several days in anticipation. "It's been — what? — 20 years since they had a No. 1 song," said Liebel. "Some of the younger generation needs to hear this music."

Not everybody was glad to be there. Lou Seekins of San Francisco, who plays accordion under the stage name Big Lou, checked the Internet to

see if she could get a refund. "We wanted to get our money back because my husband David's a bass player, and he wanted to see him."

But the lesson of Entwistle's life was not lost on her husband.

"I'm setting up a physical," said 52-year-old David Goleia.