Totally agree with everything so far, especially classes! I would also add this:
*Carry ammonia for fishless cycling (it is amazing how hard it is for people to find it without surfactants and perfumes, etc) for those not wanting to use someone else's media or to feed bb while getting set up.
*Provide a space for the sale of used equipment (tanks, filters, etc).
*Literature (books and magazines) related to the hobby, plus leaflets or brochures from local or regional clubs.
I am lucky to have an independent LFS
that is great--will order what I want, knows what they are selling, won't sell fish they know have problems, etc.