# Flagship - FiDi > Basement gym with awesome space and top-notch equipment offers challenging workouts and great coaching. The atmosphere feels claustrophobic with poor ventilation, but the environment stays very clean and the community is supportive. Source: https://www.atly.com/location/Flagship---FiDi - Address: 250 Montgomery St #150, San Francisco, California, United States - Phone: +14154631111 - Website: https://www.trainflagship.com/ ## What it is good for - Crossfit — 10/10 - Weight Lifting Gym — 8.9/10 - Gyms — 7.5/10 ## What people say - "This weight lifting gym has top-notch coaches and a fantastic, supportive community." - "I found this to be one of the best Crossfit-style gyms I had ever been to." - "The Gyms coaches are knowledgeable and supportive." ## Good to know - Arrive 15 minutes early for class to ensure a smooth check-in. - The gym features top-notch equipment and facilities across three locations. - Classes are known for their challenging programming and tough workouts. - The gym maintains a clean environment, which enhances the workout experience. - ClassPass users should check for any additional requirements before attending. ## 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.