You can spend an afternoon browsing the exhibits at Brighton Museum and Art Gallery during your trip to Brighton. Wander the area's seaside or simply enjoy one of its lively bars.
If you want to see a show while you're in town, try and grab some tickets at Brighton Theatre Royal in Brighton City Centre. Hotels.com travelers also say the area is full of friendly people and has lots of nice beaches. It's also full of great shops and restaurants, so you can spend the afternoon having a wander. If you enjoy the show and want to see another, Brighton Dome, Komedia Brighton, and Pavilion Theatre are all a short walk away.