so gemma would know her, being from the same year, and I've no doubt she'd frequent her shop for both the lingerie and any gowns. friends maybe? i mean. gemma is friendly to everyone anyway.
draco would not know her, well personally... though since she and lottie are friends, i think he's probably gotten to know her a bit since dating lottie. he would not shop there.
tess has possibly, when in the area, visited the shop for lingerie before surprising barry with it :D
if it's the same shop, then astoria has been there once (with Daisy) for lingerie... though she hasn't as yet made a return trip on her own.
mary-anne has probably only ever looked in from the outside, and it would take going with ginny, or maybe aisling, to get her into the shop and actually try things.