June 1 - 3, what's happening?



I will be going to Ibiza for three days (june 1- 3). This is my first trip to Ibiza! From all that I have read, this is still the slow season, but the timing could not be helped.

I have a few questions for the experts here:

1. I see that Space is having their opening party on June 1. What time does the party start? What will be the best time to arrive? Can I buy tickets for this event before going, or only sold at the door?

2. What other clubs will be open june 1 -3? Which one would you recommend? Any that I should avoid?

3. Any places to visit before the clubs?

All advise is welcome and appreciated! :D