The international business community has realised the potential of the Cuban market and new suitors and old beaux have been courted at increasingly successful trade fairs over the last few years. However, work practices can still be stuck in a paternalistic, top-down rut, where there is rarely anybody to take initiative (ie responsibility) or make decisions.
The laid back attitude to timekeeping found in some parts of Latin America doesn't predominate in Cuba, but transportation, communication and other every-day problems often translate into inefficiency and absenteeism in the workplace - issues government is working hard to address. Initial approaches from international businesses are usually met with great optimism and indications that anything is possible, but this is followed by total inactivity once the visitors return to their home country.
Business attire in Cuba is usually professional casual, with men forsaking jacket and tie for the dress shirt known as a guayabera, even for the most formal occasions. Courtesy is expected and hospitality should not be lavish, being offered to groups rather than individuals.
Offices are generally open Monday to Friday 0830-1230 and 1330-1630 with some opening on Saturdays. It's always best to deal with business affairs in the morning, if possible. The best months for business visits in Cuba are November to April.