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Undefined

Undefined, 35 King William St, Hamilton

4.7
RESTAURANT RATING: 
WONDERFUL
4.7 out of 5 (119 Ratings)
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1.6 miles FirstOntario Concert Hall
About Undefined
The Spotlight on Undefined

Chic Bistro Dining in the Heart of Hamilton

Just steps from Hamilton’s top live music venues, Undefined Bistro offers a warm and inviting atmosphere with a modern bistro twist. Set in a charming spot on King William Street, this casual yet refined eatery is known for its seasonal menu, creative cocktails, and approachable prices. With its mix of cozy seating and sleek decor, it's a favorite among locals and visitors alike.

Why Concert-goers love it

Concert-goers appreciate Undefined Bistro's prime location—it's within easy walking distance of popular venues downtown. The service is quick and friendly, making it easy to enjoy a full meal and still make it to your show on time. The ambiance strikes the right balance between laid-back and lively, making it an ideal stop for both pre-show fuel and post-show drinks.

Who this Restaurant is great for

  • Groups of friends looking to share plates and stories before the show
  • Solo travelers grabbing a bite near the venue
  • Couples enjoying a romantic night out with live music as the main event
  • Fans seeking a vibrant, energetic pre-show atmosphere
  • Budget-conscious music lovers who still want quality food

What People Say

Guests consistently praise the thoughtfully crafted menu, describing it as “fresh,” “creative,” and “well-executed.” The service is also frequently highlighted—many reviewers mention attentive staff and a welcoming vibe. The cocktails get a special shout-out too, with visitors loving the inventive drink list and relaxed bar atmosphere.

Areas for Improvement

Some diners note that the space can get a bit noisy during peak hours, especially just before showtime. If you’re looking for a quiet, intimate dinner, try arriving earlier in the evening. Also, while the menu is reasonably priced, portions can lean toward the lighter side, so keep that in mind if you're extra hungry.

The Bottom Line

Undefined Bistro is a stylish, convenient, and crowd-pleasing choice for concert-goers looking to eat well and stay close to the action.

Average Price
$31 to $50
Cuisine
Bistro
Opening Hours
Brunch
Sat, Sun 10:00 am-3:00 pm
Lunch
Wed-Fri 11:30 am-4:00 pm
Dinner
Daily 4:00 pm-10:00 pm
Bar
Fri, Sat 10:00 pm-12:00 am

Undefined Customer Reviews

Many have visited, but none have returned to tell the tale. Will you be the first to write a review of Undefined?

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TripAdvisor Traveler Rating

Undefined is #120 of 1477 things to do in Hamilton

3 of 5 stars3 out of 5
By: Nella M, Canada
Fri 11 Apr, 2025
l We were here for dinner, some folks had the steak which was sliced-it was delicious but portion size small, some had the salmon and pork belly which they liked, a couple of us had the scallop...

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5 of 5 stars5 out of 5
By: mhorn000, Region of Waterloo, Canada
Fri 17 May, 2024
l Great staff and a cool space. Open to the street and a patio. Lots of great beers on tap. Bartenders design cocktails around whatever base spirit you ask or you can leave it up to them. Burger was...

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3 of 5 stars3 out of 5
By: Amanda Z
Wed 31 Jan, 2024
l My husband reserved this restaurant for my birthday. We are a family of three, including our 11 year old daughter who also loves food and is not a picky eater. We are foodies, I enjoy the finer...

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Undefined 35 King William St, Hamilton