The only time I will go inside one is after 700 miles in the saddle and I need some speed and some grub. Yeah it usually cost me 15 bucks for a triple expresso con leche and a panini but the benefits and somewhat quick service allows proper time to collect oneself sitting outside. That and if the place is rather empty, well never mind...Dude!
That said I have been inside a starfahcks about 5 times, no make that 4 times.