These can all be done sweetly and pleasantly. "No thank you:)". You don't have to be a disagreeable, aloof or cranky bitch while setting a boundary.

Say no to something: this will weed out narcissists almost instantly, and pushy entitled LVM eventually.

State a boundary: eg not taking calls after 9pm or wanting to make your own way home, alone. See if he violates or respects it, or insists that you should make an exception for him.

Refuse to comply with an order or suggestion he makes: eg “Let's sit by the window” - “I'd rather sit in the shade:)”. this will weed out the PUA and redpill LVM, they're looking for women they can order around.

Mention an insecurity: see if he attacks you with it later, even as a “joke” (blood in the water test).

State a preference: eg not drinking alcohol. See if he pushes, wheedles, whines, mocks or interrogates you.

Tell an anecdote where a male disrespected or wronged a woman: eg a mechanic overcharged you, a male boss yelled at a female co-worker. See who he sides with. If he empathizes with, 'devil's advocates' or tries to explain why the perpetrator may have done it, he's putting himself in the male's shoes. He'll never have your back or support you.

State something about your comfort or well-being: eg cold, tired, sore, thirsty, getting sunburned, it's too crowded. See if he does anything to solve it or if he shrugs and doesn't care because he's fine.

Check your emotional state: has he made you feel pity with a sob story? Has he made you feel jealous of other women in his life? Has he made you feel like walking on eggshells so you don't trigger him? Has he made you feel maternal and this poor man can be fixed with your love? Has he made you feel like you'll need to do things you're not comfortable with in order to see him again or keep his interest?

Cut the date short so you can sleep: weeds out the clingy, anxious attachment men, the jealous controlling men, the boundary pushers and the PUA who want to extend the date to multiple locations to create false intimacy and make you think you've been on several dates. Also the men who know that we're susceptible to manipulation the longer we're kept awake. Also the men who only wanted sex that night. Also the men with terrible sleep schedules who don't get up until midday. Also the “sleep deprivation olympics” who think they're heroes for getting 4h a night.

Go to the bathroom after dessert: see how he takes care of the bill. Does he do it quietly? Does he make a big show of it? Does he leave it for you? Does he pretend to “not know and want your input on how you want to handle it”?

Decline any suggestion to have sex on the first date: weeds out fuckboys, redpill, PUA, time-wasters and fleshlight seekers.

If the date went badly: does he insist on following you to your car even though you've made several indications that you'd like to walk alone and split up outside the restaurant? Does he stay and badger you for answers? Does he leave quietly and understand your point of view?

Obviously the HVM move in all these steps is to respect you. Respect your boundaries, wishes, preferences and comfort. Acknowledge what you've said and drop the topic. Respect your time and appreciate the opportunity to even be on a date with you.