Attending a readers' lunch on the second Saturday of June, where tiaras are mandatory, presents a unique and delightful opportunity for authors. Here’s why it’s an event not to be missed:

1. Themed Engagement: The mandatory tiara theme adds a touch of whimsy and fun, setting the stage for a relaxed and enjoyable atmosphere. It’s an opportunity for authors to show a different, more playful side to their readers.

2. Direct Reader Interaction: Such events offer a rare chance for authors to engage directly with their audience in a more intimate setting. It's an ideal environment for meaningful conversations, feedback, and building a loyal readership.

3. Networking Opportunities: Authors can network not only with readers but also with other authors, and influencers who might be in attendance, opening doors to potential collaborations and opportunities.

4. Brand Building: Attending themed events like this helps in building a unique brand identity. It shows authors are approachable and willing to participate in community activities, which can endear them further to their audience.

5. Market Insight: These gatherings provide invaluable insight into what readers are looking for, their preferences, and trends in the literary world, information that can be crucial for future writings and marketing strategies.

6. Promotion and Visibility: Participating in such events is a great way to promote new releases or increase visibility for existing work. Authors can talk about their books, share stories about their writing journey, and perhaps even gain new fans.

7. Enjoyment and Inspiration: Besides the business aspects, it’s a fun event! Enjoying a lovely lunch with like-minded individuals, all wearing tiaras, can be an uplifting experience, providing new inspiration and a break from the usual routine.

In essence, this readers' lunch offers a blend of enjoyment, networking, direct reader engagement, and brand-building opportunities in a unique and memorable setting, making it an attractive event for authors to attend.