if it's a change from pdb you're after then you'll certainly get it at santa eulalia. it's more of a resort for older people, and by that i mean older than me. my dad rather liked it the other week when i took him and my mum for a trip out - he's 80.
yes, most bars close quite early, and the only late night opportunity you'll have is at guarana by the port and i think a couple of the bars on restaurant street claim to stay open until 4am