Don't/doesn't

If you think of the company "LA Fitness" (shouldn't it have a capital F?) as a single entity, then it should use the single form of the verb.

Doesn't it?

Don't they?

Thanks Ms. Grammar Geek but I still don't get it.

Is it doesn't or don't and what's the single form of the verb? Don't?

It is singular. Doesn't it send you coupons?

They is plural. Don't they send you coupson?

What if the sentence is changed to:

Don't LA Fitnesses send you coupons or advertisements?

Would that be correct?

I think of LA Fitness as one organization. I would use the singular. Doesn't it [LA Fitness]... ?

But when we use 'I' it's usually with a 'don't'? Why's that?

eg. I don't like it, I don't think so?

I is obviously singular, right?

With verbs, you have person and you have plural/singular.

First person singular: I First person plural: we

Second person singular: you Second person singular: you

Third person singular: he, she, it Third person plural: they

The only one that is different is third person, singular.

I do

You do

He/she/it do

Thank you!