Stats Events:
Strength: Wrestle the Braggart (+2 STR if you win, -2 CHA if you lose)
Agility: Race the Runner (+2 AGI if you win, -2 CHA if you lose)
Attack: Defend the City (+2 ATK if you win, -2 STA or -2 STR [70% sure it's STA] if you lose)
Defence: Old Soldier's Training (+2 DEF if you "win", +1 DEF if you "lose)
Vitality: ??? (No Known Event... you just get HP as you level up)
Charisma: Save the Child (+3 CHA if you win, -3 STR if you lose)
Stamina: Fair Maiden (+2 STA if you win, -2 STA if you lose)
Magicka: Mystery Box (+3 MGK if you win, Rotten Potato if you lose)
Misc. Events:
Merchant's Cart: If you STEAL, you can gain a random item, if you HELP, he gives you a little gold
Jester's Game: If you PLAY, you can DOUBLE however much you bet (the wager is a portion of your current gold, not all of it; you can't go "all-in", unfortunately)
Warlock's Portal: If you win, you get a fair sum of gold, if you lose, it's -2 or -3 ATK (not sure which)