From April through July this year, Kate*, a 24-year-old marketing manager living on Long Island, celebrated a birthday – sometimes even two – every single weekend. There was the house party that turned into a group sleepover, followed by lunch the next day. There was the “karaoke thing”, preceded by dinner. There was the summer camp-themed blowout at a house in the suburbs which was, naturally, an all-day affair. One stormy Saturday, Kate even found herself with one birthday partyhellip;read more raquo;