40 Below is a hidden gem tucked 40 steps underground beneath Revention Music Center in downtown Houston. This industrial-meets-speakeasy lounge boasts an industrial vibe with all the mystery of a true underground bar. You'll find up to 350 guests can fit in this versatile space that features a private bar, pool table, and even a built-in stage. The real magic is the private underground tunnel entrance with direct access to underground parking nearby. It's open Tuesday through Saturday from 4 PM to 2 AM, and it's the perfect spot for everything from intimate gatherings to themed trivia nights and silent discos.