Individual boxes of raisins cost $1.50 and each person wants to buy their own box, so the total cost of the raisins is 1.50 x 5 = $<<1.5*5=7.50>>7.50.
Since you have $25 and spent $7.50 on raisins, you have 25 - 7.50 = $<<25-7.5=17.50>>17.50 remaining.
Since there are 4 people in addition to you, the remaining $17.50 divided by 4 is 17.50 / 4 = $<<17.50/4=4.375>>4.375 per person.
Therefore, each person has $4.375 remaining for popcorn and a drink.