It’s gonna be one Helen of a night. Hundreds of impeccably dressed Helen Ropers are bar hopping across the metro area this month as part of a sentimental, nation-wide tribute to the beloved “Three’s Company” sit-com character. You can’t miss them: each of the boozed-up revelers will be wearing colorful caftans, gaudy jewelry and curly red wigs in imitation of the eccentric landlady made famous by actress Audra Lindley in the 1970s and 80s comedy.

“There’s good energy, good vibes, and just joy of being together and celebrating something so nostalgic,” Angela White, 56, who’s bringing the party to White Plains this Saturday, told The Post. White expects as many as 100 people to show up for the second-annual Mrs. Roper Romp in White Plains, which not-so-coincidentally comes four days after the famed actress’s birthday.

The party is just one of hundreds that have popped up across the country as part of a decade-long phenomenon that honors Helen Roper, the iconic landlady known for bugging her tenants and wearing outrageous outfits who graced television screens from 1977 to 1984. The romps have exploded in recent years, but originated in the gay community — the original Mrs. Roper Romp can be pinpointed to New Orleans’ 2013 celebration known as Southern Decadence, which saw dozens of Helens march in the parade.

Now, the trend typically comes in the form of a pub crawl, but the party is nothing like the rowdy likes of Santacon Last year, White scrounged up a.