Creating the perfect outdoor writing space for a rooftop writers' group requires furniture that combines comfort, durability, and style. Here are the top options to consider:

1. Modular Sectionals: Opt for weather-resistant modular sofas that can be rearranged to fit any group size. Materials like teak or powder-coated aluminum ensure longevity.

2. Compact Bistro Sets: Small, foldable tables with matching chairs are ideal for intimate discussions or solo writing sessions. Look for rust-proof metal or all-weather wicker.

3. Adjustable Lounge Chairs: Lightweight yet sturdy lounge chairs with reclining features offer flexibility for writers who prefer to relax while brainstorming.

4. Shade Solutions: Pair your furniture with a retractable awning or a large umbrella to protect against sun and light rain, ensuring comfort in all conditions.

5. Portable Side Tables: Lightweight side tables with storage compartments keep notebooks and drinks within reach without cluttering the space.

For added inspiration, incorporate string lights or potted plants to create a cozy, creative atmosphere. Choose furniture that balances functionality and aesthetics to make your rooftop a haven for literary minds.