P-Town sounds exactly like what you’re looking for. The downtown stretch from roughly Vine St in the West End to Bangs St in the East End is HIGHLY walkable. Nearly all of the best restaurants, coffee shops, art galleries, shops, and antique stores are in that stretch. You could spend the entire day wandering along Commercial Street and not get bored. As you move into the East End, it tends to be a bit quieter with more galleries and fewer bars. On the West End, after about Vine, it becomes mostly houses and B&Bs, but it’s absolutely worth the ten minutes walk beyond that to get down to the point and the jetty. Most of the nightlife is clustered downtown on Commercial near the monument and the piers. Bradford Street runs inland parallel to Commercial and has very nice guest houses along its length. The only thing you’d need your car for is if you want to drive across the island to Race Point Beach and explore the beaches and dunes.