Asking them if they'd like to attend some function with you is general enough to be construed as a date or not.
If you get a positive response you can offer to pay for the tickets.
For an enthusiastic response you could add dinner before or after.
If the afternoon/evening goes well then rip off your clothes and say do me.
If it's a female and her bra and panties match. She had the same idea.
If it's a male and he has a condom that isn't dried out and left a ring in his wallet, he had the same idea.