Union Pool — Union Pool is a sprawling Williamsburg bar and live music venue in a former pool supply store, known for its indie rock shows in the back room, guest DJs spinning dance tracks in the main bar, free Summer Thunder outdoor concerts, El Diablo taco truck, pinball, photo booth, and spacious stone patio fostering a consistent hip, habit-forming hookup vibe amid neighborhood gentrification.

No verifiable music artist named "Summer Thunder" exists in the search results; the term refers to a Brooklyn music series, a song title, or a podcast, not a specific performer.