Why not just segregate your coffee shop a little? Have a large number of small, work-centric tables, then a 'laptop-free' area with larger tables, and maybe so

Why not just segregate your coffee shop a little? Have a large number of small, work-centric tables, then a 'laptop-free' area with larger tables, and maybe some comfy chairs and couches. Have a big polite (or goofy) sign that suggests one side is for chatting and flirting, and one for writing and nerding. I'd put the laptops near the windows so the place always looks full, but likely has free space in the back. Tryst in Adams Morgan in Washington DC turns their wifi off on the weekends, which also seems like a reasonable compromise.