“There are other frum guys there of various stripes, including one yeshivishe looking one.”
That fact should not be used to determine whether or not it’s okay. I’m not poskening or judging whether or not it is since you didn’t ask my opinion and since I’m not qualified to posken on the matter and since I have no idea; I am simply pointing out that that should not be a factor in the decision.
To quote someone I know, “There’s plenty of room in Gehinnom for everyone.” (again, I am not poskening or passing judgment on this issue – simply pointing out that the fact that others do it doesn’t necessarily make it okay.)