The effects of heat are all due to temperature, which is reduced by dilution.

The alcohol molecules represent heat energy (Joules), and the ABV% represents temperature (Kelvin).

Rivers are small enough to be negatively affected by data center waste heat, but oceans really aren't. They are being affected by the greenhouse effect though, because that is on a scale of petawatts, a million times the gigawatt scale of all global data centers together.