Possible Clues:

• Internet abbreviation referring to events outside the online or gaming world
• Personally, not on the Internet, for short
• Off the internet, to internet users
• 'Meatspace,' for short
• Nonvirtual, for short
• Not just online, for short
• Like an offline meeting (Abbr.)
• Not over the internet, to a texter
• Not virtually, virtually
• Not just online, briefly