Pegu Club, the SoHo bar that kicked the cocktail revival in New York City into high gear when it opened in 2005 and quickly became one of the most influential cocktail bars in the world, will not reopen, a victim of the citywide restaurant and bar shutdown in the coronavirus pandemic.

“It is with a heavy heart that we have to ring the bell for last call,” Audrey Saunders, the bar’s co-founder, wrote in a letter to friends and colleagues on Thursday.

She said she had intended to keep the bar open at least until its lease ran out on Oct. 31, but “Covid-19 has taken every bit of the life we had out of us, and a soft reopening following NYC guidelines would not be enough to sustain us entering into the summer months.” Even if it had reopened, she wrote, social distancing orders would allow the bar to serve only half its normal number of customers.

The bar would have celebrated its 15th anniversary in August. Ms. Saunders, who lives in Washington State, did not immediately respond to an email seeking comment. Julie Reiner, a partner in Pegu Club, confirmed the closing.