Can anyone help me with saying no to my extroverted coworkers about going to gatherings with them?

I recently went to night shift at work and they invited me to spend time with them post work hours. As much as I like working with them, I feel very uncomfortable “going out” with them “to the club”, or pretty much any/all gatherings.

They’re very friendly and inclusive and community/family centered, so it’s a culture difference between us.

I feel guilty for trying to make excuses, but I have no clue how to explain to them that the issue isn’t them, but me. I don’t want to damage our relationship or else work might become difficult.

If social energy was US dollars, they got $2,000 all day every day and I have $50 at best, occasionally.

Aside from that, it’d be difficult for me to get places because I don’t have a license and would never consider driving without one with my epilepsy.

How can I keep a good relationship with them?

Thanks!