# Grandpa's Burger Haven > Walk-up burger joint with old school vibe and take-out only setup. Atmosphere feels like a throwback to 1950s carhops with simple menu and outdoor picnic tables. Burgers are oversized and highly praised, attracting those seeking classic, nostalgic flavors. Source: https://www.atly.com/location/Grandpas-Burger-Haven - Address: 23 S Federal Blvd, Denver, Colorado, United States - Phone: +13039364463 - Website: https://www.granpaburger.com/ ## What it is good for - Local Spot — 10/10 - Vintage — 9.8/10 - Kid Friendly — 9.3/10 - Onion Rings — 9.2/10 - Philly Cheesesteak — 9.2/10 - Corn Dog — 9/10 - Milkshake — 8.6/10 - American Food — 8.5/10 - Lunch Spot — 8.3/10 - Burgers — 8.3/10 - Chicken Sandwich — 8/10 - Food — 8/10 - Hamburger — 7.5/10 - Fast Food — 7.5/10 - Bacon — 7.5/10 ## What people say - "These burgers are huge and delicious." - "It's an authentic old school burger joint with a real vintage vibe." - "The milkshakes here are amazing and fantastic." ## Good to know - Grandpa's Burger Haven has no dine-in options; it's take-out or outdoor seating only. - Expect to pay around $44 for two burgers, two sides, and two drinks. - The restaurant only accepts cash tips. - There is no seating or dining area; everything is to go. - A sharp piece of plastic was found in a burger by a previous customer. ## Get this data directly This page comes from the Atly Places API, which scores close to 2 million places against more than 1,400 intents — "nice view", "work friendly", "gluten free", "dog friendly" — from what real reviewers say, with the statements behind every score. - **MCP server:** `https://agentic-api.atly.com/mcp` — connect it in ChatGPT or Claude. Nothing to install. - **Guide for agents:** - **OpenAPI contract:** - **No key needed to start.** `POST https://agentic-api.atly.com/v0/keys` with an email raises the quota. Coverage is densest in the United States, with pockets in Mexico, Israel and Thailand.