More than ever, it seems, nostalgia culture is “a thing.”

On TV, old shows are being rebooted (“The X-Files”) or sequelized (“Boy Meets World” turns into “Girl Meets World”).

Films are being remade (“Poltergeist,” “Point Break”), rebooted (“Star Wars”) or launched off old TV shows (“21 Jump Street”), comic books (half the movies that hit the screen, it feels like) or even video games (“Pixels”).

In music, every act that’s had half a hit tours on throwback shows. Skeptical? Google “80s cruise.” Some decent acts sure, but When in Rome — and Men Without Hats?

Which makes it easy not to notice when a truly accomplished act comes around, as Kool & the Gang will Tuesday to the Blaisdell Concert Hall.

THE R&B/funk outfit was formed in New Jersey by brothers Robert “Kool” Bell and Ronald Bell with some friends more than 50 years ago.

The group hit its peak in the early ’80s after James “J.T.” Taylor took over lead vocals, with nine No. 1 R&B singles, including one major hit that topped the pop charts in 1981. “Celebration” is still a standard at weddings and parties throughout the world; it’s a fair bet that it’s being played somewhere as you’re reading this.

Taylor left the group in 1988, but the band has soldiered on reliably despite the fact that he was the voice of almost every one of their best-known hits, “Ladies’ Night,” “Too Hot,” “Fresh” and “Joanna” among them. This should come as no surprise given how good the band was pre-Taylor, but one of the questions any band faces when a lead singer departs is how its sound will change.

The Bell brothers, who play bass and tenor saxophone in the band, push back against all objections with a crack band that revolves around original members George Brown (drums) and Dennis Thomas (alto saxophone), garnering unanimously great reviews in 2012 when they opened on a U.S. tour for … Van Halen?

Yes, Kool & the Gang were tabbed by the legendary rockers at the insistence of lead singer David Lee Roth, who watched on TV as they brought the house down at the Glastonbury Festival.

As Roth told Darryl Sterdan of Canada’s QMI Agency at the time, “We picked Kool & the Gang to open for us because Kool & the Gang and Van Halen are the sounds of an entire continent at recreation. We’ve come to represent that — although you’re more likely to hear Kool & the Gang at a bar mitzvah than me, even though I’m a brother. You go to a Hasidic Jewish bar mitzvah and they’ll play ‘Ladies’ Night’ by Kool. Me, they’ll let in — ‘But he doesn’t sing; he runs with the devil!’”

Reviews document that the group delivered; they were typically in the vein of Craig Hlavaty’s for the Houston Press, who wrote, “K&TG still give a s***, even if there are only four original members of the group and they rely on younger front men to bring tunes like ‘Celebration’ and ‘Ladies’ Night’ alive.”

YOUNGER music fans might be more familiar with the band than they realize, as Kool & the Gang have had a second life as one of the most sampled artists in hip-hop.

WhoSampled.com ranks Kool & the Gang eighth on the list of most-sampled contributors, but most of those ahead of them are rappers or obscure artists who have had one song sampled hundreds of times. James Brown may be the only R&B artist who has shown up more often in rap music.

Nearly every hip-hop artist of prominence has used Kool’s music — most prominently D.J. Jazzy Jeff & the Fresh Prince on “Summertime” (which samples “Summer Madness”) and Mase on “Feel So Good” (“Hollywood Swinging”).

Hawaii’s own Bruno Mars is among the current pop stars to give Kool & the Gang props.

Thomas told Billboard Magazine in 2014 that when he visited Mars backstage, the Roosevelt alumnus told him, “Man, you might wanna sue me after the show. I’ve stolen so much of your stuff.”

That’s one throwback act worth taking note of.