not a silly question at all. You may want to look up some "dog friendly" places in your area as not all establishments welcome pets. I know that the Corner Bakery here in Pasadena is quite dog friendly as people take their dogs there all the time and sit out in the patio area. As far as taking them inside though, this i'm not sure of.
I've been wondering, if a cafe or store does not have a sign that says "NO PETS ALLOWED", can i assume that i can take my dog inside?