But marketing executive David Hesketh thought it would be funny he went one better than that.
So he raided flatmate Amanda's wardrobe and headed off to work at Statition Plc in Tatton Street - dressed as a woman.
"I never expected it to be such a success, but the amount of women's phone numbers I got that day was incredible," said David, 26.
As he walked through Knutsford on Friday during his lunch-break, onlookers blew wolf whistles and cheered.
"People were leaning out of office windows to have a look at me," he said.
But being the odd one out for the day paid off. David and his colleagues collected more than £60 for the BBC charity.
Meanwhile, staff at De La Rue Systems on Parkgate Industrial Estate spent the day playing indoor golf in the open-plan office and eating homemade cakes.
"We all had a great time but there wasn't as much work going on as usual," said office manager Hazel Burgess.
"And there were no accidents with golf balls because we were only allowed to putt them so four metres was the longest hit."
Their efforts raise £565.
Former Knutsford Guardian chief reporter Dave Harrop, who works at the Forum of Private Business, raised £295 by shaving off half of his beard.
"My beard looked pretty horrendous and I got a few strange looks on my way into work," he said.
"But we had a good laugh for a good cause."
Staff at COS recruitment on King Street raised nearly £100 by wearing underwear over their trousers to highlight the charity's Pants to Poverty campaign.
Schools got in on the act too.
Children at Bexton Primary abandoned their uniforms for the day and raised more than £470.
Pupils tried on a pair of extra large pants at Manor Park Primary to see how many children could squeeze into them.
And all the pupils - and a few teachers - wore red noses and underpants over their trousers to raise more than £120. Cub Scouts' sponsored skip on Thursday night raised more than £100.
They managed to get 13 boys skipping in a line on one rope for nearly 15 minutes."They all tried really hard because they love to help charities and it turned in to a very fun evening for us all," said leader Ann Stojic.
Fund-raising events throughout Britain helped Comic Relief to raise a record-breaking £25 million.
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