Coworking spaces like WeWork, The Yard and Industrious host thousands of startups and scale-ups across industry categories. Testro Strategy suggests leveraging this resource; use day passes or short-term memberships to conduct discovery interviews; post research requests in community Slack channels; attend member events to recruit interview participants who match your target customer profile.
Most coworking communities are surprisingly open to helping other members with research, especially if you’re transparent about what you’re testing and offer to share insights.