At my parish, we have a 6:30 am daily Mass that many parishioners attend before work. For over 40 years now, our priests have offered Holy Communion before the start of Mass for those who must leave early, and then they proceed with the Mass as usual. I’m not sure if this is done anywhere else, but I suspect it might be. Many of us then leave right after the readings or homily, so as to meet whatever obligations we have, and as was suggested, we sit near the back we so don’t disturb the others. It is not ideal, leaving early, but since daily Mass attendance is optional anyway, I say attending part of the Mass is better than not going at all. And our pastor (as well as several previous pastors) apparently agrees.