I’ve been on a date to Sprinkles (love the place). I frankly couldn’t care less what people think (neither did my date).
But I have also gone there, picked up ice cream and then gone across the street to the park (if it wasn’t too dark and deserted) to sit on the benches there near the street (so it wasn’t Yichud).
Picking up ice cream at sprinkles and then going to the park is one of my favorite dates. (It’s really simple, I don’t have to feel bad that my guy is shelling out tons of $$, and it’s quiet and comfortable- weather pending. No awkward lounge situations etc).
Good luck!