See the hottest Annapolis trends at the fifth annual Fashion for a Cause to benefit Hospice of the Chesapeake’s Chesapeake Kids, a support system for children dealing with an illness in the family. 6:30-9:30pm at Porsche of Annapolis, Hudson St. $85; rsvp: 443-837-1531; www.hospicehundred.org.
West Annapolis transforms into a Mexican Street Festival filled with crafters, live music, artisans, margaritas, cerveza and Mexican fare to celebrate Cinco de Mayo. 10am-5pm at Annapolis St., West Annapolis: www.westannapolisbusiness.org.
Fairies and gnomes migrate to Annmarie Garden’s fourth annual Fairies in the Garden exhibit. Come to the Garden after hours for a magical mystery raffle, an acoustic performance from Tom Pillion, a silent auction and a craft table. Wine, beer and light hors d’oeuvres served. 6-9pm at Annmarie Garden, Solomons. $5 w/membership discounts: 410-326-4640; www.annmariegarden.org.
Wear a country dress and riding boots to Maryland Therapeutic Riding’s Derby Day benefit and watch the Kentucky Derby (6:24pm), bid in auctions and enjoy a buffet to benefit the program’s work helping people conquer physical, developmental and emotional challenges. 5-10pm at the farm, 1141 Sunrise Beach Rd., Crownsville: 410-923-6800; www.mtrinc.com.