First choice should be to go to the #openhouse Slack channel for team listings. If there are none available or the locations don’t work, the second choice would be to reach out to other Real agents, you can search via the MLS or Workplace. The last choice would be to find ideally a vacant home in the MLS and contact the agent for permission. DRE has softened their stance on holding open houses for other brokerages. You can do it, however there is a right way to do it. You must be sure to disclose to all visitors that you are NOT REPRESENTING the seller. You are only there to find and represent buyers for that specific property. You may also want to use the Additional Agent Addendum (Form AAA). The seller will have to sign that, along with both agents.