Costa Mesa offers a few distinct areas for evening entertainment.The Triangle Square area, located at the intersection of Newport Boulevard, Harbor Boulevard, and 19th Street, is a good starting point. You'll find a selection of bars, restaurants with late-night menus, and a cinema complex here. It's an accessible spot for a relaxed evening out.Over on 17th Street, particularly the section between Newport Boulevard and Irvine Avenue, there's a collection of upscale restaurants and cocktail bars. Many of these establishments feature extensive wine lists and speciality drinks, making it suitable for a more sophisticated evening.Finally, the area around South Coast Plaza and the Segerstrom Center for the Arts offers some refined options.