Write an engaging article about the upcoming music events at Belly Up in Del Mar, focusing on notable performances like The Core’s Eric Clapton tribute and Boris’s 20th Anniversary tour. Include practical instructions for purchasing tickets, choosing seating options, and preparing for a fantastic concert experience. Highlight the importance of engaging with other fans and supporting artists through merchandise purchases. Encourage readers to explore Del Mar’s vibrant local music scene and share their concert experiences online. Aim to create a sense of excitement and community around attending these events.