Tuna harbor park would be best, though you can also meet at seaport village which has a coffee shop.
The park will be best
At the Park will be best.
The park would work great and allow people from your group to choose from local shops right in the area.
There are multiple small Cafe nearby. All alomg the boardwalk.
I think the best place to meet would be at the small park right next to the Midway. Everyone can bring their own coffee
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