Dance away your cares at the Medford Public Library as Dance Caliente presents a fun and lively lesson on the waltz. Dancers of all levels and ages are invited to attend. Founded in 1998 by Eileen Herman-Haase and Raul Nieves, Dance Caliente brings a contagious enthusiasm to their instruction. Register through the library’s online calendar. Dance Caliente’s final class at the library this spring will be on salsa dancing (May 29).