Jesus said, "For where two or three are gathered in my name, there I am in the midst of them." Group meditation has many benefits, and can help raise the consciousness of all as well as stimulate bhakti. However it is not a substitute for your twice daily practices. Guided group meditations such as chanting, drumming etc., do not contribute to the inner silence we are trying to cultivate in our individual practices, but they are not forbidden.
Click on "Main Lessons" above to learn daily individual practices, or read more here: Group meditations
Check out the AYP Global Group Meditation for meditation done simultaneously by people all over the world every Saturday and Sunday morning.