I could come up with endless ideas, but since this is Star Trek, I'd call up Bill Shatner and invite him to a specially prepared holodeck program that included DeForrest Kelley and Jimmy Doohan at a pub. We'd shoot some pool, throw some darts and have some drinks while we chatted. Imagine the stories you'd hear spending some time with those guys.
I'd have me a Star Trek Voyager Elite Force revival.
"Iintiating Program. Welcome to the holodeck!"
RJump and strafejumping allover with nade and scav jump and I'd be allover the map making everyone disapear in a red mist.