Toast to being green at Green Drinks Annapolis monthly happy hour. This month talk greening your roof and enjoy music by the Matt Wigler Trio. Hors d’oeuvres served; cash bar. 5:30-7:30pm at Historic London Town and Gardens, Edgewater. 410-222-1919; www.annapolisgreen.com.
Learn how the U.S. is battling invasive marine creatures on our coast with the National Estuarine and Marine Exotic Species Information System. 7-8pm at Smithsonian Environmental Research Center, Edgewater: 443-482-2388; www.serc.si.edu.
Citizens and local organizations brainstorm ideas on getting the word out to kids and teens about such services as dance and acting classes, day care and more. 7-8:30pm at North East Community Center, Chesapeake Beach: firstname.lastname@example.org.