I think there is a benefit in playing with others, maybe not is this particular setting but finding a group class that matches your abilities. Playing in a group develops a certain confidence if you never have played in front others before. Also, it gives you an opportunity to perform your private lesson music in front a group that you might not get with a private teacher, unless they arrange stuff like. Most do but some don't do to logistics, place to hold it, and the almighty $$.