It sounds like a deal that’s too good to pass up: A $1,100 discount once a year for non-profits to rent the City of Manteca’s state-of-the-art community room at the new $7 million transit center.Many of the city’s non-profits aren’t exactly tripping over each other to take advantage of the once-a-year offer. That’s because the venue may have all the whistles and bells plus nice ambiance but it lacks one thing — size.While upwards of 452 people can be seated without tables the number drops to around 200 when tables are tossed into the mix.That is problematic for a number of non-profits that typically have major fundraisers that draw anywhere from 300 to 500 attendees. The savings on rent in most cases would not be enough to compensate for reduced ticket sales.