Can be a slam, ATP, challenger, futures right down to British tour
For me personally it's the Sutton 25K, great viewing facilities, got to know Nigel Sears and just generally had such a crazy, not to mention indiscreet time there....
I have never visited a tennis club. But from being a fascinating viewer, i think Wimbledon wins for it beautiful scenery, US Open for its organisation, i like the Monte Carlo Masters for its competiveness.
About the only one that I can see plenty of, both on tv and live, is Wimbledon so it has to get my vote. The French Open has decent coverage on interactive but so often they are not showing the matches I want to see. . . I can't work up much enthusiasm for tournaments that are played in the middle of the European night and so are on when I am getting my beauty sleep.
But for following on the internet, yes, Senegal has to be high on the list, even though they now seem to have lost Predrag Rusevski(sp?) to the European circuit. . .