# Ninja Nation - Centennial > Gym offers huge space with obstacles of varying difficulty and a dedicated level for proficiency activities. Atmosphere is energetic and chaotic with kids running around, supported by engaging coaches who keep all skill levels active and involved. Open play and party amenities attract families, making it a popular spot for children's events and physical activity. Source: https://www.atly.com/location/Ninja-Nation---Centennial - Address: 8644 S Peoria St #800, Centennial, Colorado, United States - Phone: +17208749024 - Website: https://www.centennial.ninjanation.com/ ## What it is good for - Fun Activities — 10/10 - Party — 8.4/10 - Kid Friendly — 8.4/10 - Birthday Parties — 8/10 - Gyms — 7.5/10 ## What people say - "The staff here is so patient and helpful with kids." - "It's a lot of fun for kids and adults alike." - "It's a fun gym where kids love to play and stay active." ## Good to know - Birthday party packages start at $300 for up to 10 kids. - Reservations for birthday parties are recommended at least two weeks in advance. - The unlimited monthly membership for open play costs $90 and allows daily access. - Ninja Nation hosts adult open gym nights every Friday from 8pm to 10pm. - Safety procedures are reviewed with participants before starting any activities. ## 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.