English-speaking dance instructor Hélio Ricardo offers private and group dance classes in samba or forró (a popular music of the Northeast). To try out your new moves, take a samba class and night tour combo: you'll get a one-hour crash course, then head out to Lapa for a night of dancing in a club (US$60 per person, including guide, transportation and club admissions).
Classes are held in various studios around Copacabana and Ipanema; you'll get details on the location when reserving a lesson. Group classes are available most nights (from 7pm or 8pm). Private classes are available from 2pm onwards.