How to get comfortable “Meditating” in public.

I get lunch alone quite often, and every now and then will go to a coffee shop. I’m so tired of staring at my phone but that’s what everyone else is doing so I feel weird NOT doing that. But really I just kind of want to stare off into nothing. Lol. But I feel like the people around me will be weirded out. Any advice on getting over this hump?