There are plenty of gaming opportunities in Boston. There are groups that meet all over the greater Boston area, practically everyday of the week. You just need to find a group that fits you schedule and style.
You best bet is to come to Unity Games XIII this Saturday, Aug 11.
The event runs from 9 am to minight and is $15 a person. The event is at the Sheraton Colonial in Wakefield.
The event is designed to bring all the local groups spread around Eastern New England and get them together for the day. It's a perfect opportunity to meet some of the local gamers and find people in your area.
More details can be found here:http://www.unitygames.org/ugxiii/ugxiii.htm
If you can't make it on Saturday, there is also a Yahoo group for Unity Games that is great for scheduling game nights or just talking about games.