SAFE
Fishing Trawler (Team keeps the boat afloat and get lots o' good fishing loot) Great for people who like to fish and make a bit of money from getting the fish they caught.
Trouble Brewing (Teams compete for who brews most rum + avoid aggressive monsters) You get exp for crafting, firemaking and cooking plus you can trade the points for pirate gear, lvl 2 clue scrolls, teleport rum to the activity and 50% chance of making mature ale.
http://runescape.wikia.com/wiki/Trouble_Brewing#Rewards
Barbarian Assault (5 person team fighting various monsters) Fight penance monsters than fight the mighty queen. Rewards can be either exp after each wave or honor points that can be used to buy penance equips.
http://runescape.wikia.com/wiki/Barbarian_Assault/Rewards
Pest Control (Team Combat protecting a Vulnerable Void Knight) Rewards can be traded in for Melee and HP exp, Void equips, herb packs, ore packs and seed packs.
http://runescape.wikia.com/wiki/Pest_Control#Rewards
Soul Wars (Needs 40 Slayer to kill monsters + defeat opposing team's Avatar) Its a PVP game, but its safe and you get rewards for your team winning or losing making it a win-win game. You can also trade the points for exp in your skills.
http://runescape.wikia.com/wiki/Soul_Wars/Rewards
Tzharr Pits (Safe PVP with rewards) Its like PVP/Bounty Hunter, but safe plus we get rewards for the person who is the last person standing. You get Tokkul as a reward which can be traded for up to iron ore, gems (sapphire, emerald + onyx), runes, toktz equips, and onyx bolt tips.
Rewards - Tokkul used for trading for items.
Blast Furnace (People work together to keep the furnace running + making bars costs half the coal) This is an event for people who like to smith because you only need half the coal to make bars from Steel and higher.
Rewards - Smithing EXP
Stealing Creation (Players compete by making items and sending them back to base for points) This would be a great event with the clan since we can do Non-Combat games and we can rack up points which will increase exp gained from skills and combat.
http://runescape.wikia.com/wiki/Stealing_Creation/Rewards