There are more than one bands with this name. Read the full article for all of them.

1) French hip-hop group. Please fix your tags for N.A.P., from their full name "New African Poets"

2) Bartholomew Napolitano from Long Island, New York.

3) Brazilian one-man-band - Nap released 3 albums (2003, 2004,2006) mixing punk rock and crappy electronic music. Recently appeared on the virtual tribute "In the Aerorate Over Your Music" made by users from RateYourMusic.com . He covered the song "Communist Daughter". He's also a member of Acrizios. Check his songs at: http://www.virb.com/Nap/

4) Dutch gypsy music orchestra.
Nap has a large repertoire of Hungarian, Rumanian and Russian gypsy music.
They like making plenty of contact with the audience while playing
They play at their audience's table, at their ear or even walking.
In that they always are very welcome guests at all possible festivities.
(translated and adapted from http://www.zigeunermuziek.com/nap.html)

5) Croatian rock band

6) German Stoner Rock group
A mostly instrumental group, though with occasional vocals, Nap is a stoner rock group featuring the classic "Power Trio" lineup. From Oldenburg, Germany. https://napofficial.bandcamp.com/track/ungeheuer Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.