(no subject)

[superslayer18.livejournal.com]

Hey guys, two quick questions for you, both from the same sentence :)

I was listening to Куда приводят мечты by UmaTurman and was pleasantly surprised that I understood the majority of the song.  It's pretty slow, but quite nice!

Anyways, at one point he sings "Давай-ка выпьем по сто грамм что ли" (taken from an online lyrics site where I was double checking that I wasn't hearing things incorrectly).  

Why would he use давай-КА?  Is it just a slangy variant or is there some grammar rule I'm missing here?  EDIT: Can you add it to imperative?  Like Читай-ка or беги-ка? What about in the formal?  Would it be давайте-ка?

I assume Что ли is just a way of ending a sentence looking for an affirmative answer, like "how about it?".  Is that correct?

Thanks!

(no subject)

[upthera44.livejournal.com]

Any recommendations of a good online Russian thesaurus?