As others have said, the PCs should figure that out for themselves. Even if they don't manage to smuggle something in, they can grab improvised weapons (break a chair to make a club, or just use the chair as is). Pick up weapon off the dead bodies, or grapple the enemy and take their weapons. The possibilities are limited only by their imagination. Pull a tapestry off the wall and use it as a net, pick up a bench and use it as a ram... etc.
As others have said, the PCs should figure that out for themselves. Even if they don't manage to smuggle something in, they can grab improvised weapons (break a chair to make a club, or just use the chair as is). Pick up weapon off the dead bodies, or grapple the enemy and take their weapons. The possibilities are limited only by their imagination. Pull a tapestry off the wall and use it as a net, pick up a bench and use it as a ram... etc.
Playing D&D since 1982
Have played every version of the game since Basic (Red Box Set), except that abomination sometimes called 4e.