Manila and Philippine visit

Dear all, I will be flying to Manila on Sat 9/03/13 AM for business (staying in Green Belt area) and will have Sun 10/03 off and the following weekend 16&17 March, then have time off starting from 19/03 till I fly out from Manila on 24/03 evening.

Can you please let me know where I can visit and see for these days off, whether it is a day trip/short trip and island trip for the Protected content . I heard about Tagatay - Taal crater lake, which I presume is a day trip (What is best way to go there or where else I can have other trips?) Also if I like to go to a nice beach for relaxing, but also for some activities, sightseeing, night life, tours; then considering the tight schedule, where would you recommend to go without wasting too much time? Finally is there any gathering happening or meeting that I can join you in or meeting any, after work for a drink or a bite. Cheers and thank you in advance.