- Brewfest Prize Ticket
- Binds when picked up
- Item Level 1
Source
This item is a quest reward from the following quests:
[70] Pink Elekks On Parade- [70] There and Back Again
[70] Bark for Drohn's Distillery!- [70] Bark for T'chali's Voodoo Brewery!
- [70] Bark for the Barleybrews!
- [70] Bark for the Thunderbrews!
[70] 
[70] Notes
Based on Wowhead info...
Here is a (probably incomplete) list of ways to get tickets.
- Quest [70] There and Back Again - 15 Tickets
- After you have completed the quest, [70] Now This Is Ram Racing... Almost., you may pick up this quest. You must travel to either to Kharanos/towards Razor Hill on a ram mount and run near Flynn Firebrew for Alliance or Bok Dropcertain for Horde. The NPC will have an arrow over his head if you have the quest, so that it is easier to see. He will throw you a keg and you must return it to the quest giver. Do this circuit 3 times in 4 minutes to complete the quest. Update : I mistakenly listed this as a daily.
- Event - More keg runs
- After you complete [70] There and Back Again, you may request one more 4-minute ram ride from the quest-giver for the day. For every circuit you complete, you gain another 3 tickets. The timer on this is separate from your daily quests, and will reset 12 hours after you requested another mount.
- Daily quests - 40 Tickets (There are two quests available per faction, but you may only complete one per day.)
- Also done after [70] Now This Is Ram Racing... Almost. Two stands at your faction's Brewfest will seek barkers do advertise for them. You must run to four different locations in your factions respective Brewfest-hosting city on a ram mount. (Orgrimmar for Horde, Ironforge for Alliance) The ram mount is needed to complete the objectives, but you may use your regular mount to to the quest giver if you see fit. This seems to have been changed to 40 tickets because the Dark Iron invasion was disabled. However, it is apparently bugged for numerous characters according to Drysc.
- Alliance locations: In front of the Bank, Military Ward, Hall of Explorers, and Mystic Ward.
- Horde locations: Valley of Strength (Auction House), Valley of Honor (towards battlemasters), Valley of Wisdom (Thrall's stronghold area), and Valley of Spirits (Troll/Mage area, portal area).
- Quest [70] Pink Elekks on Parade - 40 Tickets
- Travel to the beer gardens outside your faction's other 3 capital cities and kill 3 Pink Elekks per location with the provided item. You must be drunk in order to see the elekks. This quest seems to be unattainable for some level 70 players on a case-by-case basis. Possibly a bug by server/character.
- Event - Dark Iron Dwarves. (This event is temporarily disabled)
- Every hour at half past, a legion of Dark Iron Dwarves will pop out of tunneling machines in the ground. You must toss [Complimentary Brewfest Sampler] at the dwarves in order to gain Brewfest Keg Protector buffs. You gain the samplers by doing a /wave emote at one of the NPCs advertising their respective brews. After you have a mug, use it to drink and toss the mug to a dwarf in front of you. The Keg Protector buff apparently stacks to 25 according to Drysc on the general WoW forums. This is not an absolute limit on your ticket-farming, as you can turn in your current buffs and return to the battle. There will likely be many other players raring for an extra handful of tickets, so try to time your toss to coincide with their spawning. Each driller seems to spawn two invaders.
- A note on gaining Complimentary mugs. You will automatically get another mug after throwing away your original mug as long as you are in range of a barker. Contrary to a previous version of my post, there is NO need to spam emotes for a supply of mugs.