Keep Fit Activity (Singapore)

HI there guys..am thinking of organizing a group of girls and guys who are keen to keep fit but would like to do it in a group or do not want to pay for classes but more at our own free time.

Anyone who likes to dance can lead the group. So we need a dancer.
Myself i am an Indian so i can lead for bollywood dancing though am not an expert.
Or we can get a group and play soccer or volley ball on the beach.
Any ideas or suggestions are welcome.