They actually somewhat care about the dude at the $5 blackjack table. That means the beer lady actually comes around every 20 min. Palace Station: a big casino/hotel that caters to 'locals'. The poor college friends? Riviera or Palace Station.
The wealthy ones? I tell them to stay at the Venetian (suites for $150/night weekdays).
I help plan dozens of friends' trips to vegas each year.