My go to albums for 'entertaining' are Miles' Kind of Blue and Sade A Love Deluxe. Not a jazz album like the Miles one, but perfect for 'entertaining'....
As for albums, Kind of Blue and Something Else are two staple, must have albums. Stunning stuff. You may already have them. KoB by Miles and Something Else is Cannonball Adderley with Miles.
I'd also check out Miles' first quintet albums Cookin', Workin', Relaxin' and Steamin'.
The next must have album should be Moanin' by Art Blakey and the Jazz Messengers. Brilliance.
A best of compilation of Horace Silvers stuff is a must have (otherwise, get Song for my Father), and Sidewinder by lee Morgan.