THEY MIGHT BE GIANTS We do not live in a quirk-friendly era. The hipster code permeates pop culture today to such an extent that irony and its twin sisters Snark and Sarcasm are virtually the only acceptable modes of “fun.” Nowhere is that more true than in popular music — a band like these ’80s/early ’90s N.Y.C.-based stalwarts wouldn’t stand a chance today. But their arrival prior to grunge, before all this seriousness set in stone, enabled the inventors of Dial-A-Song — a phone line that played TMBG songs on an answering machine — and revived “Istanbul (Not Constantinople)” to flourish and build a long-running cult following. Their 15th release, last year’s Join Us, turns back toward the original TMGB formula: peppy pop songs written with peppery irreverence. With Jonathan Coulton. $25 and up. McGlohon Theatre.