The best to advertise a restaurant would be
the use of word of mouth if cost considerations
would be built in.
Based on that, you can make small tickets which
you give to anyone who makes a purchase in your
restaurant, then print small handbills and on it
say something like "eat three times and get free
xyz on the next visit"
Have the handbills distributed around or when
people come in groups of 4 or 5, give something
free.
Something else you can try is...
If you have a beach around, hire a few kids (pay
with a free meal) and get them to write the name
of your restaurant and address every 10 to 15paces
all over the beach.
You can also make Tee shirts with your name and
address and give to customers who have visited
you repeatedly 4 to 5times. They'll wear it and attract
visitors for you.
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