If each box of raisins costs $1.50 and there are 5 people (you and 4 friends) buying a box, the total cost for the raisins will be:
\[ 5 \times 1.50 = 7.50 \]
Now, subtract the total cost of the raisins from your budget of $25:
\[ 25 - 7.50 = 17.50 \]
This remaining amount is $17.50, which needs to be divided among the 5 people for popcorn and drinks:
\[ \frac{17.50}{5} = 3.50 \]
So, the amount of money that remains per person for popcorn and a drink is:
\[ \boxed{3.50} \]