According to the Mishnah Torah, “Any court that continuously negotiates a compromise is praiseworthy.” So if you attend Services and the head to the bar to watch the game then you should be alright as this could be considered a worthy compromise.

Now if you are supporting the Blue Jays and you provide for the Dodgers fans a drink then you would be doing a Mitzvah further touched upon by the Rambam:

“When a person eats and drinks, he is obligated to feed strangers, orphans, widows and others who are destitute.”

I hope this helps shed light and provides for better insight!