Shake Shack, a New York-based burger chain with legions of fans, revved up for business in Westport with a welcoming party Tuesday night at its new roadside stand on Post Road East.

On the eve of its opening, more than 100 guests gathered at the restaurant to sample Shake Shack favorites such as its Black Angus burgers, flat-top hot dogs and frozen custard "concretes."

The Shake Shack chain is part of restaurateur Danny Meyer's Union Square Hospitality Group, which includes well-known New York City restaurants such as Union Square Cafe, Gramercy Tavern and Eleven Madison Park.

"I want this to be a beloved member of its community," Meyer said Tuesday. "I hope it'll appeal to people from a lot of different walks of life. We'll know that we've done our job when this community adopts this place not just as a great place for burgers and shakes, but as a great place to be with one another."

The first Shake Shack opened in Manhattan in 2004. In addition to Westport, the burger chain has several other outlets in New York City, as well as restaurants in Washington, D.C., Miami, Dubai in the United Arab Emirates, and Kuwait City, Kuwait.

"We wanted to learn whether Shake Shack would play in a non-urban community," Meyer added. "We decided that we wanted to pick a great community that was within easy commute of New York so that we could keep a close watch over it."

A festive mood prevailed at the new burger stand on Tuesday. Knee-high children scurried around the patio, as their parents socialized. Meanwhile, attendees in their 20s and 30s tapped their feet to the uptempo rock and blues numbers of the New York City band, The Crooners. Inside, steady lines at the order and pickup windows kept employees busy throughout the evening.

"The beauty of Shake Shack is that every demographic loves it, is comfortable here, and can afford it," said Randy Garutti, Shake Shack's chief operating officer.

A single hamburger at the Westport Shake Shack costs $3.75, a New York hot dog goes for $3.65, while a regular-sized concrete costs $6.50. The menu also includes a range of drinks, such as Brooklyn Brewery's ShackMeister Ale, local seasonal draught beer and wine.

The new Shake Shack is housed in a 3,500-square-foot renovated storefront previously occupied by Pho Mekong Thai-Vietnamese Noodle House and Restaurant. It holds about 100 people, including 20 outdoor seats.

Employing a 60-member workforce, the Westport Shake Shack will share its building with the Pinnacle Health and Fitness Club, located in the rear of 1849 Post Road East. The Westport eatery is also the burger chain's first outlet to offer on-site parking, with approximately 50 spaces.

Garutti described the aesthetics of the Westport Shake Shack as "classic." Positioning itself as a "modern version" of 1950s-era burger stands, the restaurant features a front sign perched on a steel I-beam. Customers enter through opened garage doors and dine at tables made of wood salvaged from a Glastonbury cigar factory. Reclaimed barn wood siding inside the restaurant also exemplifies the "classic" look.

The burger stand's offerings earned enthusiastic reviews from several guests interviewed by the Westport News.

"I had the Shack-cago Dog and a mushroom hamburger, which had really good texture," said Matt Ventura, a chef from Westchester County, N.Y. "I'm planning to come back here. It's a little more accessible than going to a Shack Shack in the city."

Sarah Nikkel, Liz Roberto and Mark Lumpkin, all from New Haven, also praised the menu.

"We kind of had a little bit of everything," said Lumpkin. "We were pretty liberal in our sampling."

"It's great -- two thumbs up," Nikkel said.

"We're definitely coming back," Roberto added. "We're loyal fans."

Shake Shack's fare even received an endorsement from a local doctor.

"I highly recommend this," said Westport resident Adam Pearl between bites of his burger. "It goes down very easily!"

The Westport Shake Shack at 1849 Post Road East is open seven days a week, 11 a.m. to 10 p.m. Sunday through Wednesday, and 11 a.m. to 11 p.m. Thursday through Saturday.