There are a lot of vintage places in Second Life, I personally prefer specifically 1950’s and shabby chic style.
They blend quite well, and add a dash of beach chic and you get something fantastically fun for summer.
I can highly recommended FIN, and Sweet Tea Couture for clothing and furniture.
This is my take on something stylish:
record player from FIN, shoes from sweet tea couture, dress from sn@tch, and I made the rug myself.
I used a retro filter on the photo too. My ambition is to get a full retro house, by the beach, and have it filled with period items.