At lunchtime (assuming its at the cafeteria)… have lunch next to some random colleague you dont know at all or are only vaguely familiar with.

Chances are the person might be surprised, and may be too reserved to say anything. Chances are a conversation might start up all stiff and formal, and then sort of gets stiffled. Maybe you’ll start searching for words and it eventually ends up in an awkward silence, making you wonder how you ever got into such a stupid situation in the first place (and make a mental note to flame me later!).

There are also chances that you make a new friend. [so may turn out to be worth the risk]