To represent the situation using an inequality, we need to consider the total cost of the T-shirts for all 8 members of the band.
The total cost can be calculated as:
\[ \text{Total Cost} = 8t \]
where \( t \) is the cost of one shirt.
Since the band wants to spend no more than $136, we can set up the inequality:
\[ 8t \leq 136 \]
This inequality represents the condition that the total cost of the T-shirts must be less than or equal to $136.