Here's a secret those free wifi providers don't want you to know: usually, they don't check your email or ask you to verify it, so you can just enter suckurmomsball@gmail.com If they do show a second screen asking for an email, just create a tempmail adress on cellular and switch back to verify. It works 99.99% of the time.

Edit: you also don't have to enter any real personal information, how would they know?