Nightlife, Antigua style, offers you the chance to flex your cultural knowledge, or to flex your arm hoisting a few with friends. The city is filled with watering holes. Many of the spots within a few blocks of the Parque Central are favored by people studying Spanish at one of the many language schools. Don't forget, either, that lingering over dinner is a time-honored way to pass an Antigua evening.
Your best source for upcoming events is the monthly English-language Revue magazine www.revuemag.com. Pick up a free copy in hotels and restaurants around town, or check out its website for complete reproduction in PDF format.