# Flagship - Marina > Very large gym space offers challenging classes with instructors focused on proper form. Regular attendees form a consistent core group, supporting both beginners and experienced athletes. Facility supports diverse workout routines for a hard workout. Source: https://www.atly.com/location/Flagship---Marina - Address: 1995 Union St, San Francisco, California, United States - Phone: +14154631111 - Website: https://trainflagship.com/ ## What people say - "The coaches at this weight lifting gym are so supportive and make sure you have correct form." - "The coaches at this gym are super approachable." ## Good to know - The gym has a one-week usage limit for classes. - Classes are challenging with instructors focusing on form. - Expect a consistent group of attendees in classes. - The gym offers a variety of classes for all fitness levels. ## 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.