Hey guys

So basically, I've had these thoughts and dreams of me getting into performing (singing) for years. It's something I have always whinged about wanting to do but never gotten around to doing it due to mainly laziness. I've pictured it in my head and dreamed about it.
I have tried finding other musicians but I have been unsuccesful.
But I may have discovered something that *could* work.
Today I discovered a site that has instrumental music files! But actually decent ones (They aren't the dodgy MIDI/Polyphonic rubbish I have heard in the past) They have a huge variety and they sound fantastic. They are up to date, in key songs ranging from upbeat rock to folky melodies. They are accurate and the best thing about them is they come with harmonies! Proper, beautiful back vocals. AND you can adjust the key higher or lower to suit your voice too.
They cost US$2.99 (so about 5-6 AUD) each.
I have pulled out and dusted off my guitar and I'm getting into that again. I'm not that great so I am planning to get some lessons happening and I'll get some more singing lessons to improve...I stopped having lessons about 3 years ago.
So the question is...if I was to get into performing at weddings or something, or at nice loungey type pub, are people going to enjoy having someone singing with music that isn't being physically played? Or are they going to think I'm tacky/lame and not talented, and lazy? Because I don't want to get into performing if people are going to think I'm crap cause I don't have a full band behind me. What do you think?
I've been to a few functions where there has been a woman and back up tracks. I quite enjoyed it and I didn't think she was lazy/stupid/tacky cause of it? Maybe it's just me.
There would be songs that I would play my guitar to with as well though...and maybe I could brush up my piano skills and get a little keyboard or something?
Would it really be that bad?
Honestly?