Another factor or type which can be attracted are the Med students at Maimonidies Hospital such as the Congregation Ohr Hachayim of upper East Side in Manhattan does for the med students from Mt. Sinai and Lenox in N.Y.C.
This is a very important topic and we all have to try to keep this shul alive.
Even though i attend rarely such as for High Holy Days or special Shabbosim, i make an effort to give a nice contribution annually.
Perhaps their website should be updated weekly and there should be communal functions such as inspiring lectures that may attract more(for a fee of coarse).