Dataset for globular star cluster Where can I find the 
dataset(s) for a globular star cluster?

The datasets should have the coordinates, color index (for different wavelengths) , magnitude etc. of every star in the cluster. 

I want to do data analysis on it just for fun.
I would start by doing a search on VizieR, select "Globular_Clusters" from the right-hand list box (this tells me there are around 900 catalogs in this category) and click "Find Catalogs".

Some of the returned results will be catalogues of stars within a given cluster, the density map on the right-hand side of the list will show these as a single point. Other catalogues will be lists of multiple globular clusters, the density map will show there is data from all over the sky.

I hope that's useful for you!