As bidding for Lena Dunham’s first book reportedly climbed to $3.7 million, the budding author was seen Saturday night with a literary lot. The creator of HBO’s “Girls” hit a party thrown by New Yorker editor David Remnick, with guests including Gay Talese, Malcolm Gladwell and Andy Borowitz. But she spent the night huddled with Carrie Brownstein, the indie rocker who has her own cult cable-TV comedy series, “Portlandia,” and short hipster hairdo. “The Brooklyn Bridge is closed today. How will anyone get into Manhattan to fulfill their big city dreams!?” Dunham, 26, tweeted before she appeared Saturday, along with Ben Stiller, Lisa Kudrow and Patti Smith, at the New Yorker Festival. Also spotted at Remnick’s bash were Sarah Silverman, “Cloud Atlas” director Lana Wachowski and “School of Rock” screenwriter Mike White. Dunham’s proposed book — “Not That Kind of Girl: Advice by Lena Dunham” — reportedly has five publishers chasing after it. “SNL” veteran Tina Fey got $5 million for her 2011 book, “Bossypants.”