The added advantage of using the roof is that you can get a sun tan at the same time.The boss's office: For members of the Dangerous Sports Club only - unless one of the participants happens to be the boss.

If you are asked out by a co-worker and turn them down, keep that quiet too.

Don't boast about your pulling power and don't mock the afflicted. Stress: The most effective way of stopping all those hormones and testosterone in their tracks. Good stress-surfing brings about the old adrenalin rush that can engender frisky behaviour, but negative stress can make you too tired and anxious even to notice the sex of the person working next to you, let alone fancy them.

The Chat-up: Fancying someone you work with is not a criminal offence and neither is asking them out. Are you in any danger of being accused of favouritism if you start to see each other outside work? When someone operates in this manner, it is difficult to know when to say "no, thank you".

It's always wise to keep in mind, though, that in the workplace you should think and plan before you act. What are your positions in the company pecking order? If you do tell this colleague you're not interested in them as a partner they may claim - unfairly - that that was never their intention in the first place, craftily extricating themselves from the area of conflict, leaving a sour taste all round.

This isn't talking killjoy, this is just being practical.

Do what you want on the social scene, but in business do not be too eager.

This system obviously has advantages over night-time pick-ups in darkened clubs, holiday romances, (notoriously short-lived), or blind dates arranged by friends. High-powered City workers of the Nineties are accustomed to using the office as a complete life- support system. Making a pass is a dangerous manoeuvre in the workplace. Trying to blur the lines between business and pleasure will appear sleazy.

If your interest is not reciprocated you could be accused of sexual harassment or - at least - end up looking sad and sleazy once the office gossips have done their worst. How highly do you value this person as an employee/ colleague/ friend? This would entail getting someone to work late at the office and then taking them out for a meal "because it's too late to go home and cook" or taking them away on a business conference and making sure your rooms are next door to one another. Working well with someone means being relaxed with them - and that is impossible if you're not sure whether they're trying to seduce you or not.

It is difficult jilting anyone you have to work with, but once you have had sex it is a million times tougher and more complicated. Don't tell even your closest workmates what went on.