Ideas for activities during summer

Hi Everyone,

I really hope and wish to get a good circle of friends through IL. I was thinking would be good if i get friends in the area i reside so that we all can have some fun activities during summer and we can meet and share our interests.

Please suggest what are the possible activities that we can carry out during summer....I know Summer is the time for all our door activities, Unlike winter, the day time is longer...

Also suggest ideal places aroung Virginia , Maryland and DC during summer....

Sri