Is there a good way to request specific styles? I'm thinking some of the lesser known Brazilian styles like:

Maxixe
Tango Brasileiro
Choro-lento
Forro
and a reversed samba pattern (samba is a two measure pattern - first measure starting on the downbeat - second on the anticipated upbeat. In Pagode it is common to flip the order so that the first measure is an anticipated upbeat - the second starting on the downbeat).

A very good reference for guitar players is in Billy Newman's Guitar Atlas book Brazil.