Casinos (like the Aladdin)
need additional income
sources to supplant
their operations. 
These environments are
adults only, and
have traditionally been an oasis
for smokers.  On the other hand,
tobacco companies have been hindered
from their abilities to spend advertising dollars through conventional sources.  Beyond this, other advertising options, such as for upcoming events, need succinct forms of memorable advertising.
 

Solution:

By unifying your Gametronics affiliation, instead of having bells, bars, or other symbols, you turn each icon into an advertising region.  With software, which you either license separately or as a premium service, you allow casinos to sell advertising space on their slot machines.  Due to the specific nature of Nevada Gaming Laws, no one under the age of 21 may loiter or use any machine.  Therefore, no advertising will be legally viewed by any minor.

This application serves other options as well, for advertising machines might also have a paper printer system so as to print out freebie coupons, tickets for events, and other prizes to offset the payout schemes and to shift the cost of prizes to advertisers themselves.