# Fitness Underground Erie > Small classes focus on personal improvement with varied, challenging workouts that change every session. The atmosphere supports a tight-knit community and offers flexible scheduling including boxing and mixed cardio and weight training. Source: https://www.atly.com/location/FitnessUndergroundErie - Address: 149 S Briggs St Suite 104D, Erie, Colorado, United States - Phone: +19493742892 - Website: http://www.fitnessundergrounderie.com/ ## What people say - "The weight lifting gym offers great, challenging workouts that are never the same." - "The coaches at this gym are so encouraging and helpful." ## Good to know - A free trial class is available for new members. - The gym offers a variety of workouts with weights and cardio throughout the week. - Boxing classes are now part of the workout schedule. - There are plenty of class times available to choose from. - The app used to book classes has improved over time. ## 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.