It may be a cliche on the radio, but around the piano at a Circuit avenue barroom sing-along on Monday night, the audience sang the old Billy Joel lyrics with nuance and exuberance: “Sing us a song, you’re the piano man, sing us a song tonight.” David Crohan was playing his Kurzweil electric piano.

What could be better? Well, soonafter Mr. Crohan was accompanied by his old friends Hugh Taylor and Merrily Fenner and more.

“It was just like being back at David’s Island House again,” said Barbara Riedinger, a seasonal resident of Oak Bluffs, who sat with friends near the performers.

The night brought back to her fond memories of the musician playing here, too, in the same space, years ago, when it was called Munro’s. “I can tell you where the piano was back then. The piano was right by the door. I remember the dog,” she said of the room also known as the Boston House.

This time the evening began with Mr. Crohan doing a solo performance, not far from the flat screen televisions showing he Red Sox losing to the Cleveland Indians.

David moved the microphone close to his mouth so he could be heard above the noisy crowd. He spoke personally as if to friends in front of him. And many of them were. While it was hard to hear what he had to say, the audience shushed when the musician played.

The faces of the audience rolled back and forth. They tapped their hands on the table when the maestro played Scott Joplin’s Pineapple Rag. Later he did the Maple Leaf Rag; his left hand and arm emphasizing the alternating bass.

It was Billy Joel’s song Piano Man that got the audience singing, some with eyes watery. Wearing his usual sunglasses, Mr. Crohan swayed unaware that his audience swayed with him. The pianist sat under a Harpoon neon sign. A large picture window to the outside was behind him and displayed a frolicking Circuit avenue.

Four elegantly dressed ladies, 1961 graduates of the Martha’s Vineyard Regional High School, shared a table, watching and listening with delight. Ginny Coutinho, Betsey Healey, Annie Young and Donna Bond applauded feverishly after every song. They came just to hear and see Mr. Crohan on this night, they said, because they had memories to reignite.

Under a low spinning ceiling fan, Hugh Taylor and Merrily Fenner, both guitar players and singers, joined Mr. Crohan on the little stage. They sang Will You Still Love Me Tomorrow, a Carole King tune.

After the song, patrons exchanged hugs with the musicians.

The next tune was Peaceful Easy Feeling, an Eagles song.

Hugh Taylor sang another, Sitting on the Dock of the Bay.

There was dancing to go with the singing.

Mr. Crohan said afterwards that Hugh and Merrily had performed at his old Circuit avenue establishment, David’s Island House, from 1987 to 1997. “We had them every week for 10 years,” Mr. Crohan said.

He couldn’t remember precisely the last time they performed together as a group. “Maybe we did a wedding together, at least eight years ago,” he said. On this night, he said the musicians didn’t rehearse, but who would have known that they didn’t?

As part of Mr. Crohan’s festive evening, Katie Mayhew of West Tisbury, a graduating senior from the regional high school, sang two Broadway show tunes with the casual man at the keyboard.

For Mr. Crohan this has been a whirlwind week of music. The night before, he and Miss Mayhew had performed at the Whaling Church in Edgartown, his annual fundraiser for COMSOG.

This Sunday, August 8, Mr. Crohan will perform at Union Chapel. It is a solo evening of medleys, from Frank Sinatra to Simon and Garfunkel, Carole King and the Beatles. It is his last performance of the season here.

He leaves next Monday to return to his home in Lake Worth, Fla., a little reluctantly by the sound of it: “I really love the Vineyard. On one day I can perform Mozart to Chopin, do Broadway tunes with Katie, and the next day be doing something else. That is what I love as a life of a musician.”

But for seven years Mr. Crohan has performed at Cafe L’Europe in Palm Beach. Mr. Crohan said he misses the Vineyard and liked being here doing a week of nonstop work.

“I am trying to think of a way to come back. I am thinking of opening another place next year. But I want to see if I can still draw [an audience]. I haven’t been here that much so it is a great delight to see that the concerts have been full. The turnout on Monday night was tremendous,” Mr. Crohan said.

David Crohan plays at Union Chapel in Oak Bluffs on Sunday, August 8 at 7:30 p.m. Tickets are $25.