There are at least 3 groups known as The Pirates (a pub rock band, Australian rock band, and a British punk band):

1) The Pirates are a pub-rock band from England. They played in 60's as a backing band to Johnny Kidd (the most notable song of Johnny Kidd and The Pirates is "Shakin' All Over"), and reformed in 76.
Lineup included Frank Farley, Johnny Spence and Mick Green. Mick Green, guitarist of Pirates famous for his unique "choppy-style" guitar playing (lead and rhythm at the same time) which influenced such great musicians as Wilko Johnson of Dr.Feelgood and Pete Townshend of The Who.

2) The Pirates are a 3 piece rock band from Melbourne, Australia. They draw influence from The Pixies, Queens Of The Stoneage, Beastie Boys, The Strokes, Shooting At Unarmed Men, and Mclusky. The Pirates comprise of Mundo (vocals/drums), Kade (guitar/vocals), Mick (bass). For more information visit:
www.thepiratesrock.com

3) The Pirates were a short-lived British oi band formed in Nottingham, UK. They released one EP titled Taking Action. Vocalist Zara Kane went on to become a solo artist in the industrial metal genre.

4) A group of fictional pirates singing the Spongebob Squarepants theme song during the Sponge Bob Square Pants Movie

5) A name briefly adopted by The Temptations on the single "Mind Over Matter (I'm Gonna Make You Mine)" / "I'll Love You Till I Die", released September 29 1962. Motown owner Berry Gordy told the group that should it be successful, they would become the Pirates fulltime, which included appearing in pirate costumes. To the Temptations' relief, the record sunk without a trace.