So based on the following description I found in WoWhead about the event, the event will be able to teleport your character to 2 locations in outland and 2 locations in pandaria, all normally not being available to us free 2 play.
The "current" party location is rotates between all the following locations, but whichever you visit, you will find a tavern mage that teleports you to the "current" party location. Therefore, getting your 100 alts that has not set hearth in the shrine to Moonglade (everyone has fp) or Booty Bay, Rachet (easy access) and wait until the current party rotates to Pandaria, then get all your alts over within minutes
.
Quoted text:
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This event is a micro-holiday; it will last only for a short period of time but has no "must-have" rewards.
Event description:
The mages of Azeroth like to relax, too. Hop into a portal at your local watering hole and join the Tavern Crawl!
Start this event by finding the mage
Tipsi Wobblerune outside your faction's Inn in Legion Dalaran. Speak to the Mage to be taken to an Inn around Azeroth!
Every few minutes, Tipsi Wobblerune will allow you to teleport to a new Inn. Each inn will have food and drink which gives 300 to a secondary stat when buffed.
Laughing Yeti in Everlook:
Sparkling Snowplum Brandy
Firefly Tavern in Cenarion Refuge:
Coilfang Reserve
Nighthaven Inn in Moonglade:
Entangling Rootbeer Entangles your character for a second.
The Road Warrior in Gadgetzan:
Mechs on the Beach
Thirsty Alley in Valley of the Four Winds:
Barrel-Aged Stormstout Calls down lightning.
Tavern in the Mists in the Veiled Stair:
Blackout Kick Turns your screen black.
Broken Keel Tavern in Ratchet:
Wiley's Wicked Ale Turns you spectral red.
The Oasis Inn in Silithus:
Liquid Qiraj Increases your size.
World's End Tavern in Shattrath:
Sargeras Sangria Transforms you into an imp.
Salty Sailor's Tavern in Booty Bay:
South Island Iced Tea
You can buy the beverage unique to that Tavern from that Tavern's Food & Drink vendor, as well as
Blackrock Coffee if you need to sober up.