2. Sponsored head-shave or wax. Get as many people as you can to volunteer to get their head shaved or legs waxed, then host the event one lunchtime or after work, when everyone else can attend and donate money. plan in advance and ask people to make a donation and/or bring in their penny jars from home!
9.Office Treasure Hunt. Hide a selection of items in the office, then give participating people the clues to each item (they pay £2 to enter the hunt). The person who finds the most items wins a bottle of wine or similar.
10.Contest to win a half-days holiday. Ask your boss to donate a half-days holiday and hold a contest for someone to win it. This idea has lots of scope as you could come up with just about anything for the contest.