Hi @wavewatcher, good question. We do not have a direct integration with Venmo, but it should be possible with WooCommerce. Out of the box, Event Tickets Plus will allow you to integrate with WooCommerce to sell tickets. So you can use whichever payment processor you use for other sales through WooCommerce. https://theeventscalendar.com/products/wordpress-event-tickets/
Tickets will essentially be modified WooCommerce products — they can be added to your cart and purchased alongside other WooCommerce products you sell. The checkout process is the same for tickets as your other products.
One thing to note here, is we are not directly associated with WooCommerce or the developer of their Extensions.
Let me know if this helps.
Best,
Abz