I don't think those Nissans, Toyotas and Land Rovers are 'Jeeps'!
Jeep is a brand, but I'm sure you already know that.
It'd be more appropriate to call it a 4x4 Club or perhaps off-roaders club! Or you can call it 'Beyond Asphalt', for the sake of uniqueness.
Just some alternate naming suggestions, that's all.
Happy trails!