I am not familiar with a large number of Dominicans. The two parishes staffed by Dominican priests both have the OF as their primary Mass, as follows:
Mon.-Fri. Dominican rite 6 a.m., OF 7 a.m. and noon.
Sat: Dominican rite 6 a.m; OF 8 a.m., “Sunday” OF 5:30 p.m.
Sunday: Dominican rite 11 a.m.; OF 7 a.m., 9 a.m., 1 p.m. and 5:30 p.m.
The Dominican rite is similar to the EF.
The other parish is a campus parish; as they do not note any of the Masses as Dominican rite, I would presume they are all OF.
They are a mendicant order, and are not monks. They are formally known as the Order of Preachers (O.P.).