Day 8 of the grass-court Grand Slam is the busiest of the two-week tournament, with 16 fourth-round singles matches on the docket. It's one of many traditions that make Wimbledon unique, and a favorite of players.When it is tea time at Wimbledon, even if there is a nail-biting tennis match being played, most of the dignitaries in the Royal Box and even most of the fans out on Court 14 or Court 19, the ones wearing cocktail dresses and those wearing jeans and T-shirts, head out for refreshments.