Sree Krishna Himself prayed to Lord Ganesha to remove the obstacles in marrying Satyabhama. Sree Rama invariably prayed to Lord Ganesha all the time before He started the war with Ravana. All Indian Vaishnavities (Except stupid ignorant fanatics) pray and pay respects to all important forms of Lord like Shiva-Durga, Karthikeya-Valli-Devayani, Ganesha and all forms of Narayana... NO Discrimination as its like disrespecting Sreeman Narayana Himself.
Raghavan